Loneliness Stefan, that's why you and I memorialize our dead. There's the briefest of moments, before we kill, where we literally hold their life in our hands and then we rip it away and we're left with nothing. So gathering other peoples letters or writing their names on a wall is a reminder that in the end, we are left infinitely and utterly alone.
Niklaus Mikaelson (a.k.a. Nik or Klaus)is an Original/Hybrid, and the son of an unnamed werewolf and Esther. He has six siblings that consists of five half-brothers and one half-sister. A deceased unnamed older brother, four other half-brothers named Elijah, Finn, Kol, and Henrik. And a younger half-sister named Rebekah. Klaus is also the step-son of Mikael, with whom he had a strained relationship with.
He is first mentioned in a conversation between Rose and Stefan warning him about the Originals. Klaus is believed to be the most hated and feared of all the Originals and those who fear him are desperate for his approval. Over the centuries Klaus has become a recluse who confides in and trusts only the members of his inner circle.
For over a thousand years Klaus has been trying to a break a curse that bound him to a moonstone. He created the myth of the sun and moon curse in order to help find the moonstone and the Petrova Doppelgänger that was needed to break the actual curse. His goal was to bring out hiswerewolf side so he could sire his own super race.
In 1492, he finally got his chance to break his curse when he met Katerina Petrova, the final piece for the ritual. He kept her entertained until the full moon, but was unaware that she found out what he was and what he wanted from her, causing Katherine to escape from him. After Katerina turned into a vampire he assumed that her family line ended with her and that his chance to break his curse was forever gone, Klaus traveled to Bulgaria and slaughtered her entire family in revenge.
For the next 500 years, Klaus was searching for a way to break the curse without the doppelgänger and had forced generations of witches and warlocks to help him for centuries. Along his search for a way to break his curse, Klaus hunted down his family and neutralized them. Also he was searching for Katerina Petrova, who escaped him and stole his moonstone.
His love interest is Caroline. Klaus falls for her, claiming he likes her because she's beautiful, strong, full of light and "too smart to be seduced by him."
He is the main antagonist of Season 2 making his first appearance in Know Thy Enemy, in Alaric's body.
Klaus was born to Esther and a unknown man, in a small village that would eventually become known as Mystic Falls. Klaus has six half-siblings and a step-father named Mikael, who was a wealthy landowner who moved with Esther to the New World when their home village was devastated by a plague. Klaus was close to his family with the exception of Mikael, this was because Klaus was not his son and from a different bloodline.
Many years before his mother had an affair with a man from a different species. When his brother Henrik was killed by a werewolf, Esther performed a ritual which transformed Klaus, his siblings and his step father into
vampires. When he made his first human kill, his werewolf gene was activated, thus informing Mikael of Esther's unfaithfulness. Mikael then hunted down and killed Klaus' father and his entire family, not realizing that he was igniting a war between vampires and werewolves that has been perpetuated across the ages. Soon after becoming a vampire and discovering his werewolf bloodline, a curse was placed on Klaus by Esther, forcing his werewolf side to lie dormant and then abandoned him. In retaliation, Klaus murdered his mother, and framed Mikael for the act.
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Elijah and Klaus
Klaus was with Elijah, and Rebekah in 1114 AD Italy when they met a man named Alexander. He was a vampire hunter who was part of the five. They spent alot of time with him who was unsuspecting thanks to their daylight rings while they tried to get information on how he plans on killing vampires for their own self preservation and because Rebekah loved him. However when he was invited to a party at Alexander's home along with his sibling they got daggered however Klaus being a hybrid was not affected and he killed all of the five including Alexander. He undaggered his siblings (except for Finn) and found out from Rebekah that Alexander's weapon was a "cure". However, due to the Hunter's Curse, Klaus was forced to endure 52 years 4 months and 9 days of torturous hallucinations that attempted to make him kill himself, and haunted his dreams and every waking moment.
He was a nobleman in the late 15th century England where he met Katerina Petrova. He planned to use her in the sacrifice, but she escaped. After Katherina escaped, she was turned into a vampire unintentionally by Rose.
In retaliation, Klaus traveled to Bulgaria and murdered her family for her defiance. Over the centuries, Klaus was obsessed with finding Katherine and a way to break his curse without the doppelgänger and the moonstone ever since.
During the 1920s Klaus and his sister Rebekah were on the run from the vampire Mikael, a vampire hunter from his past. The siblings were in Chicago in 1922 where they met the vampire Stefan Salvatore that Rebekah fell in love with. At first Klaus hated Stefan, but that changed when Klaus discovers that Stefan was a Ripper and they became good friends. One day they were attacked at a bar by Mikael. Before Klaus and Rebekah left, Klaus compelled Stefan to forget him and Rebekah. Later when he and Rebekah were about to leave Chicago, Rebekah told Klaus that she was tired of running and wanted to be with Stefan. Klaus then forced her to choose between him and Stefan, she chose Stefan. This made so him angry that he neutralized his sister with a White Oak Ash Dagger, he then took her body with him in a car and left Chicago.
Isobel Flemming, a vampire working for Katerina Petrova who now went by the name Katherine Pierce, who also happened to be the mother of the second Petrova doppelgänger, was trying to find Klaus and ultimately succeeded by getting close to a member of his inner circle. Klaus found out what she was up to and compelled her to tell him what she knew. When he learned that she was working for Katherine and that the rumors about a doppelganger in Mystic Falls were true, he decided to use her in a plan to capture Katherine and the Moonstone.
Along with Klaus's trusted warlock, Maddox, Isobel made Katherine believe that Klaus was willing to pardon her if she delivered the Moonstone and the doppelganger to him. While Katherine found the Moonstone, Isobel helped Maddox capture her former husband, Alaric Saltzman. Katherine and Isobel then captured Elena at which point Isobel revealed her true colors and Maddox captured Katherine. He then ordered her to let Elena go since Klaus didn't need her yet. Maddox then transferred Klaus's spirit into Alaric's body so that he could spy on Elena and her friends.
In The Last Dance, Klaus interrogated Katherine for information about Elena and her friends and learned that a witch Bonnie Bennett could be a danger to him so he decided to kill her. Still pretending to be Alaric he attacked her at the 60's decade dance by compelling several students. Finally cornering Bonnie, he forced her to use all her power and die. He didn't realize that she had faked her death to protect herself and Elena.
In Klaus, he has Maddox, and his other minions, including Greta, bring his original body to him so that he can return to it. While they are doing so, he sets up a contingency plan by threatening Jenna's life. As Stefan stops him from killing Jenna, Klaus tells him that it would be easy for him to take his revenge if Elena tries to stop him from breaking the curse. At the same time, Elena learns from Elijah the real nature of the curse and why Klaus wanted to break it. He was then released from Alaric's body and returned to his own by Maddox and Greta.
Klaus back in his own body
Klaus goes to the Mystic Grill to remind Damon not to do anything he will regret. Damon asks if he can postpone the ritual, but Klaus says he has everything and the ritual will happen. He warns him not to screw it up if he wants to live. Klaus returns to Alaric's apartment and is immediately suspicious of Katherine. He compels her to tell him what she has been doing but, as she is taking vervain, she is able to lie.
He is still suspicious and 'compels' her to take off her bracelet, walk to the window and stand in the sunlight. Katherine has to do it and screams. Eventually Klaus believes she is compelled and says she needs to do something for him. When the full moon begins to emerge Stefan and Elena arrive home but are confronted by Klaus, who tells Stefan that he had him all nervous and thought he had done something stupid. Klaus asks if Elena is ready. Stefan put his arm in front of Elena and says "No". Klaus tells him there is no reason for him to die, and he and Elena leave for the ritual.
Klaus returns to Alaric's apartment and tells Katherine that Elena is with Greta. The door flings open and Damon tells Klaus to postpone the ritual, explaining that he rescued the werewolf and vampire and killed Maddox. Klaus tells him that he knew either Damon or Stefan would try to stop him and reveals that he always has a back-up plan. He shows Damon on a webcam that he has captured Jules. Damon asks if he has a back-up vampire and Klaus says he has got it covered, before darkness falls on Damon. Katherine wakes Damon up and tells him that Klaus has gone to begin the ritual. She admits that she had to do something so Klaus wouldn't realize she was on vervain, and reveals that Klaus made her call Jenna, to lure her out explaining that he needed another vampire because Damon's blood was impure due to his werewolf bite.
Klaus reveals to Damon that he always has a back-up plan
Klaus appears at the quarry and begins the sacrifice by handing the moonstone over to Greta. Klaus walks over to Jules, who then tries to attack him but fails. Klaus rips out her heart then squeezes the blood into the spell. The sacrifice continues and Elena begs Klaus to let Jenna go, explaining that she doesn't have to die. Elena doesn't want to leave Jeremy without a family and points out that she did everything Klaus asked. However, Klaus realizes that Stefan has arrived and goes to speak to him on top of a cliff, who wants to replace Jenna in the sacrifice.
Klaus and Stefan return to the women and Klaus asks Elena who she wants to save and who she wants to die. However, he soon reveals that she doesn't really have a choice and stakes Stefan in the back. He explains that he has other plans for Stefan and needs him alive. Greta removes the fire from Jenna and Elena starts crying, Jenna then rushes over to bite Greta. However, Klaus stabs her, lies her down and stakes Jenna in the heart.
Klaus appears and tells Elena it's time, offering her his hand. She refuses it and walks past him to the sacrificial altar. Klaus thanks her, but she tells him to go to hell. He bites her neck and feeds from her until she falls onto the ground, lifeless. Klaus announces that he can "feel it happening" and begins to transform. Bonnie appears and throws him across the ground. Greta heads over towards them, but Damon breaks her neck.
Bonnie continues to cast the spell with Klaus yelling to the top of his lungs in pain. As he is about to.die, Elijah approaches him at which point Bonnie stops the spell. Klaus seems terrified as he sees his brother towering over him. Elijah punches through Klaus's rib cage to get to his heart as he asks him to say the names of their family. Klaus then tells him that he didn't bury them at sea and that their bodies were safe and that Elijah would never find them without him. After some consideration, Elijah saves his brother without Stefan or Bonnie being able to stop him.
A few days later wakes he up in the forest with Elijah over him. Elijah gave him some clothes and asked him where are the bodies of their family. Klaus says that he will take him to them in time. Later they go to Alaric's apartment where they find Katherine and Stefan. Stefan tells Klaus that he needs his help for Damon, and knows Klaus has a cure for Damon's Werewolf bite. Klaus suddenly stakes Elijah with the white oak ash dagger, and then he runs towards Stefan and puts a wooden stake close to his heart. Stefan then tries to make a deal with him. Klaus will give him a cure for a Werewolf bite and he will be at his mercy. He releases
Stefan and then he bites Katherine and gives her his blood and tells Stefan that his blood is the cure, and in exchange he forces Stefan to drink human blood several times. In the end he tells Katherine to go and give Damon his blood. Later he and Stefan go to a warehouse where he puts Elijah's body in a coffin and tells some men to put him with the others, then he tells Stefan that they will leave town after Stefan does something for him. Then a girl comes and Klaus bites her and tells her to run and then Stefan blocks her path and kills her much to Klaus' approval, after that Klaus and Stefan leave town.
Klaus has been tracking down a werewolf named Ray Sutton and tracks him through the whole Eastern seaboard leaving a trail of bodies behind which are caused by Stefan. He ultimately finds him in Tennessee where he has Stefan kill two more girls before they corner Ray in a bar. There, Klaus tells Ray that he is a Hybrid and that he wants to create more.
He has Stefan torture Ray using darts tipped in wolfsbane to force Ray to reveal the location of his pack. At this time, Klaus is warned that Damon Salvatore had gone to the house where they had killed two women. He decides to go and put Damon in his place but Stefan insists that he should go in his place. Klaus lets him. He ends up getting the location of the pack from Ray, then he finds the location of Ray's pack and ends up feeding Sutton his blood before killing him so as to turn him into a Hybrid.
In The Hybrid, Klaus and Stefan find Ray's werewolf pack in the woods. Klaus turned them all into Hybrids. When Ray bleeds through his eyes and feels pain, Klaus then discovered that there something wrong with the hybrids. Then Ray soon became rabid and fled the site. Stefan tried to stop him and was bitten. Klaus was only willing to give Stefan the cure to the fatal bite if he retrieved Ray. When the same thing happened with the other hybrids he killed some, and some died on their own When Stefan came back with Ray's dead body Klaus was angry over that he could not make Hybrids. Klaus gave Stefan his blood and left the camp with Stefan leaving the hybrids dead body's on the ground.
In The End of the Affair, Klaus and Stefan are shown to have arrived in Chicago, where Klaus plans to meet "his favorite witch", Gloria, to find out why he can't make any new Hybrids. Stefan finds a picture of them together at the bar, and Klaus reveals they knew each other, that they had been friends back in the 1920s and that Klaus was Stefan's "number one fan", as he liked Stefan's ways of torturing others before killing them. He had erased his memories to protect themselves, as they were running from a yet unknown person. Gloria tells them that she needs Rebekah, as she has something Gloria needs. Klaus resurrects his sister, but she does not have her necklace, which can be used to contact the Original Witch.
In Disturbing Behavior, Klaus is still using Gloria to try and find the necklace used in contacting the Original Witch. Klaus later finds out that Stefan was asking about Mikael, the person that he was maybe running from in the 1920s. Klaus seems angered by this and knocks Stefan out then takes him back to Mystic falls to find out why he is still holding on to his former life.
At the beginning of The Reckoning, Klaus corners Elena, asking her why she is still alive. He takes her by the arm and leads her to the gym, chasing away the other students by telling them they're busted for pranking. Elena tells Klaus not to hurt anyone, but he argues that he has to. Rebekah drags Tyler's body into the gym, and they wait till Bonnie arrives, where Klaus tells her she has to find a way that he can successfully create hybrids.
Stefan later comes in and pledges allegiance to Klaus, but both knew it was a lie as soon as Klaus hurt Elena, and Stefan tried to stop him. Klaus then compelled Stefan not to fight him and to listen to him. He ordered him to kill the two teenagers, Dana and Chad, who Klaus had compelled to stay there. To make a game of everything, Klaus puts a clock on it: Bonnie has to find a way for him to create hybrids, or else Stefan must kill Elena.
After Stefan tried to fight the compulsion, Klaus yet again compelled him, this time with a stronger force to turn his humanity off, finally getting Stefan to obey. Presumably, Stefan attacked Elena, but somehow Klaus must have stopped him, as he figured out himself how to create a Hybrid: with the doppelganger blood. He fed Tyler the blood, and Tyler then changed into a Hybrid.
Klaus and Rebekah after he found the solution to his hybrid problem
In the parking lot of the hospital, Damon comes to rescue Elena, but Klaus stops him, saying he could kill him now that his brother doesn't care. Damon tells him that Mikael knows where they are. Klaus replies that he's bluffing, but Damon informs him that they found Mikael's tomb. Klaus threw Damon against a car and vanished without a trace. Klaus leaves town in search of werewolves he can turn into hybrids. He manages to find several, successfully turning them into hybrids.
In Homecoming, Klaus receives a call from Stefan who tells him that Mikael is dead. Thanks to the fact that Elena really did stab Mikael with a white oak dagger, Stefan is able to override Klaus's compulsion when he is forced to tell the truth. Rebekah, who has learned that Klaus had killed her mother, confirmed what they had said in an attempt to lure him back to Mystic Falls. Klaus says that he will be on his way. Klaus has Tyler throw a party to celebrate Mikael's death.
After seeing who he thinks is Elena, he reveals that his hybrids are present, and they have orders to kill Damon if Klaus is killed. The party goes well, until one of his hybrids say that a guest named Mikael is waiting for him. Visibly angered, he goes to meet his step-father. Klaus attempts to have his hybrids attack Mikael, but Mikael reveals that while they are sired to Klaus, they are part vampire and can therefore be compelled by Mikael. Mikael reveals that he had one of the hybrids grab 'Elena' and threatened to kill her if Klaus didn't come outside of the Lockwood house.
Klaus tries to call Mikael's bluff, but Mikael stabs her. To everyone's shock, it wasn't Elena at all, but Katherine, who throws wolfsbane grenades at the hybrids and runs. Damon then appears and attacks Klaus with the white oak stake. However, Stefan interrupts the battle, pulling Damon off of Klaus. Klaus grabs the stake and drives it through Mikael's heart, killing him and destroying the stake in the process.
When Damon asks Stefan what he was doing, it is Klaus who answers by saying that Stefan was earning his freedom, he then gives Stefan his freedom. Klaus then left. Unaware of his sister's role in the murder attempt, he tries to call her saying that is time to go, but is unable to reach her (do to Elena daggering her). Stefan then calls and reveals that he stole the coffins with Klaus' siblings, who Klaus intended to revive now that Mikael was dead. Klaus threatens to kill Stefan and anyone Stefan ever met, but Stefan merely replies that if he does, he will never see his family again.
In The New Deal, he builds himself and his hybrids a house to stay at Mystic Falls. He meets Damon and Elena at the Grill wants to know where Rebekah is. He leaves, saying to Elena she should find Stefan. He calls Jeremy and tells him to go outside on the street and not to move. He intended to kill Jeremy by a car accident. To save Jeremy's life, Elena made a deal with Klaus. She shows him where Rebekah was and he spares Jeremy's life. He leaves with Rebekah, after Elena told him that she knows he killed Esther. Back home Rebekah slowly recovers but Klaus stabs her again with the White Oak Ash Dagger, killing her.
In Our Town, Stefan visits Klaus and tells him to get his hybrids out of the town. When he doesn't agree, Stefan kills Mindy by decapitating her. Klaus is angry and tells Tyler to bite Caroline but he refuses. Later, Klaus attended the Founder's Council Feast and tries to convince the Mayor that his hybrids would protect the town, successfully. After Damon received a phone call from Stefan that he has Elena and is trying to turn her into a vampire, he goes to talk to Klaus.
Klaus thinks Stefan bluffs but calls Stefan. Hearing that Stefan has Elena fed his blood, he promises to get his hybrids out of Mystic Falls. After Tyler accidentally bit Caroline he went to Klaus asking him for help. Klaus goes to the Forbes place to heal Caroline. Liz invites him in and he has a intimate conversation with Caroline about being a vampire. Eventually, he feeds Caroline his bloods and says "Happy Birthday". After Caroline woke up, Klaus has left but she finds an expensive bracelet made of dozens of diamonds. A gift from Klaus.
In The Ties That Bind, Klaus is seen in one of Bonnie's dreams as she tried to open the locked coffin. Back in present time Stefan went to Klaus and talks to him. Klaus states that he wants his family back, now that his Hybrids left town. It is revealed that he ordered Daniel Warren to the house of Abby Bennett as he called him later. When Damon went to the Abandoned Cottage, Klaus came and gets tortured by the spirits of the dead witches.
As he threatens to kill all witches they stop hurting him. He then commands them to show him the coffins and they do. Just the fourth one is missing. He asked Damon where the last one is and he threatens to rip out his heart but he doesn't get an answer. After all coffins were moved to his house, Klaus had to go to finish some business but is surprised by Elijah, un-daggered earlier by Damon, standing in front of him after he killed a hybrid.
In Bringing Out The Dead, Elijah attacks Klaus for having locked him in the coffin but Klaus overpowers him and, having pulled the dagger out of their brother Kol, threatens to use it on him. Elijah retorts that he would have to deal with Kol then. Klaus resigns himself to that fact and tells Elijah that Mikael was dead. Surprised to hear of his father's death, Elijah asks why their family remains in the coffins. Klaus asks Elijah to help him to get the fourth coffin back from Stefan by reminding him of the oath that they had sworn to one another: 'always and forever'. Elijah then organizes a dinner between Klaus and Stefan with Damon present. The deal offered by the brothers is that, in exchange for the coffin, Klaus will leave Mystic Falls forever, a deal that Elijah deems to be fair.
Klaus later counters with his own offer: Elena's future happiness with a human husband (Matt Donovan) in exchange for the coffin; this would keep her safe from what he deemed to be feuding between the Salvatore brothers and would ensure the continuity of the Petrova bloodline so that he could keep creating hybrids. Stefan refuses the deal. Klaus then grabs him and burns his hand in the flames while Elijah prevents Damon from intervening. Klaus tells Damon to bring him the coffin or he will kill Stefan. Damon complies and Klaus sends Elijah with him. However, Elijah and Damon returns after wards not with the coffin but with the daggers that Elijah had removed from their siblings.
Elijah claims to have learned not to trust Klaus's promises and declares that this while be done on his terms. Kol then appears followed by Finn who stabs Klaus in the hand after he tries to seize the dagger. As Klaus tries to run, Rebekah appears and stabs him for 'their mother'. Klaus stumbles back and is caught by Kol. Elijah dismisses Damon and Stefan, claiming that it was 'family business.' Esther then appears and tells the originals to stop fighting. She tells Klaus to look at her and asks if he knows why she is here. When Klaus suggests that she is probably there to kill him, she says she is there to forgive him, and that she wants them all to be a family again.
InDangerous Liaisons, Esther organizes a ball to celebrate the reunion of their family and asks Klaus who he is going to bring to the ball, stating it's going to be a magical evening. So Klaus sent an invitation and a ball dress as a present to Caroline with a note to dance with him. She appears wearing the dress and the bracelet he left in her room on her birthday. She later dances the waltz with him, asking her how she is after Bill died. He makes a complements about her dancing skills which she commented with having had some training.
They are later seen outside, standing next to a horse. Klaus states that he had a horse but it got killed by Mikael. He also stated that the relationship with his father was really complex as Caroline's was with Bill. She then goes inside because she likes people too. They then go inside the house where Klaus reveals that he likes drawing, having drawn many people and also a landscape which is now hanging in the house. He asks if she has been somewhere and that he could take anywhere she wants. Caroline then says it must be good if he gets everything he wants. She thinks that's the reason
One of his drawings.
he creates hybrids and wants him to give Tyler his life back. She also states that he compels people, he sires hybrids or buys affections to make friends and she is not the girl he can buy off. Angered, she leaves and Klaus is alone.
In All My Children, he is with Kol in the house. Rebekah comes home from her one night stand while Klaus is drawing pictures (presumably of Caroline). Kol states he's bored so he and Nik go outside. They head to the Grill where they meet Alaric and Meredith Fell. As a distraction, planned by Damon, Caroline enters the pub but isn't pleased to see Klaus. He follows her outside, wanting to talk about her. She sits down and talks with him. After Kol got neutralized, Klaus feels something and immediately recognizes something must have happened, getting angry at Caroline because he suspected her.
Klaus and his brothers confronting Esther and Finn.
He rushes to Kol, pulls the dagger out and threatens to kill the Salvatore's, but is stopped by Elijah. Together with Kol and Elijah he goes to the Witch Burial Ground. He orders her to end this and he'll send her back to hell. She responds she hated it to see how he shed blood. After she left with Finn, Klaus is seen burning the pictures he draw of Caroline. Rebekah enters, stating she hated him as she found out that he killed Esther, but Klaus is the only one who has never left her. She then delivers shocking news. Klaus learns that a sapling of the White Oak Tree has been planted 300 years after they left the Old World.
In The Murder of One, Klaus and Rebekah join forces to get Finn on their side by reuniting him with Sage. He then gets Bonnie to undo Esther's linking spell. He first tries to bribe Bonnie by offering to reunite her with her mother, but when Bonnie refuses, he instead threatens to kill Jeremy. Klaus watches as Rebekah tortures Damon, but they stop when Stefan comes by and offers to trade his White Oak Stakes for Damon's freedom. Klaus then learns that there are more White Oak Stakes and that one of them was used to kill Finn.
In Heart of Darkness, Klaus tires to get the last remaining White Oak Stake, and sends Kol to stop Damon and Elena from learning of their bloodline origin. He gets impatient and eventually kills Alaric, but soon enough, he sends Rebekah to retrieve it, not knowing that Rebekah is possessed by Esther.
In Do Not Go Gentle, Esther while possessing Rebekah convinces Klaus to go the 1920s dance by telling him that Caroline will be there. In the dance Klaus sees Caroline and Tyler dancing and he interrupts them by asking Tyler where he's been. He then asks Caroline to dance in which she at first rejects him but then Tyler says it's alright for her to dance with him. Klaus shares a dance with Caroline and tells her how she would of loved the 1920s and that he will be leaving Mystic Falls that night. When Rebekah is absent from the dance, Stefan informs Klaus that Esther is back. After Esther is killed, Klaus states angrily that Esther will never be able to stop him and that he will continue to live.
Klaus at the Gilbert home
In Before Sunset, Klaus is informed by Rebekah that Alaric survived, and that the white oak stake has no effect on him. Rebekah wishes to leave, but Klaus states that he will not leave without Elena, causing Rebekah to get angry and state that she won't care even if he does die, before leaving. Klaus then goes to Elena's house to collect her, however Stefan and Damon bar his way. He begins attacking the house from the outside, trying to force them to invite him in, but the manage to repel him. Just as he is about to cause the place to explode, Stefan comes out and says that Alaric has captured both Elena and Caroline and will only give them up if Klaus hands himself over. Klaus initially refuse, but Bonnie comes up with a plan that will allow them to actually succeed. He then agrees, but makes it clear that after this he is taking Elena and leaving. He waits in front of the school-where Alaric has Caroline and Elena-with Stefan and the two talk, Klaus trying to drive a wedge between the brothers again.
When Stefan states that all of Klaus' attempts to break the Salvatore brothers apart has only made their bond stronger, Klaus counters by asking what will happen when Elena finally chooses between them. Then, Bonnie, Damon and Jeremy show up. Bonnie gives the vampires a vile of her blood, saying that once they drink it, all they have to do is make a connection with Alaric's heart, and she will use her magic to stop it, effectively neutralized him. After drinking the blood, Klaus enters the school with the Salvatores.
He comes across Caroline and grabs her, keeping her quiet and telling her that she will be fine, and that she
must get home as soon as possible, she thanks him then runs. Stefan and Damon restrain Alaric, and Klaus plunges his fingers into his heart, but Alaric manages to get free, break Stefan and Damon's necks and nearly drove his white oak stake through Klaus' heart. Ironically, Elena saved Klaus by threatening to kill herself, deducing that Esther bound Alaric's life to hers so that he could only live one life time. As she prepared to follow through with her threat Alaric went to stop her, freeing Klaus, who then ran off with her.
He then began draining Elena of all her blood, that way gaining enough blood to at least have some hybrids, while also killing off the greatest threat to him. When Elena asks why he is killing her, as he won't have an unlimited army anymore, he states that he doesn't need one as he has his family back. Elena counters saying that they will never truly trust him again, and that he is wants a back up family, which is why he is draining her blood instead of simply snapping her neck. Later, Tyler shows up and tries to free her, but Klaus finds him before he can get Elena out of the house.
Klaus expresses his softer emotions before dessicated
He asks how Tyler broke the sire bond, and Klaus states that that is impossible, Tyler countering by saying that true love is more important than sire bond induced loyalty. Klaus states that Tyler should be thanking him as he saved Tyler from the misery of life as a werewolf, but Tyler says that Klaus doesn't give a crap about him, he only wanted to not be alone. Klaus then prepares to kill him, but Stefan and Damon arrive. Tyler and Damon restrain Klaus, while Stefan plunges his hand into Klaus' chest, and Bonnie begins her spell again. Klaus looks at Stefan with a mixture of sadness and shock as his life fades away. He is then completely desiccated , and his dead body falls to the floor. Everyone then holds a victory party, and Stefan and Damon later drive off with the purpose of disposing of Klaus' corpse.
In The Departed, Damon stores Klaus's coffin in a warehouse outside of Mystic Falls. Bonnie arrives at the warehouse, and Damon tells her that he hid Klaus's coffin in compartment 1020, saying that compartment 666 would be too obvious (666 is the Devil's number, with Damon indicating that Klaus is the Devil). Bonnie and Damon enter the compartment, and open Klaus's coffin. Klaus wakes up from his sleep, but is still in a dessicated state. Bonnie then asks Damon to give her a moment alone with Klaus, saying that she wants to appreciate the sight of him like this. After Damon leaves, Bonnie tells him that he should burn in hell.
However, she knows that if he dies, so does her mother and friends, and she questions him what she is supposed to do about that. Off-screen, Bonnie saves Klaus from Alaric by performing a spell that transferred his spirit into Tyler Lockwood's body and possibly preserve his physical form. Later, Alaric shows up at the warehouse, catching Damon off guard. He demands to know Klaus's location, and Damon tells him that he stored in one of the compartments. Rebekah later shows up to retrieve Klaus's coffin. Rebekah and Damon try to sneak Klaus out of the warehouse, but are caught by Alaric. Alaric slams Rebekah against the car and tosses her aside. Damon tries to stop Alaric from opening Klaus's coffin, but fails. Alaric does so, and brandishing the White Oak Stake, plunges the weapon into Klaus's heart. Klaus gasps in pain and bursts into flames, Rebekah screaming in horror. Damon gives Rebekah time to escape Alaric.
Afterward you see Bonnie talking to Tyler and realize she put a spell on him to transition his "soul" in with Tyler. He tells her that she did the spell brilliantly and he didn't think she had it in her as she tells him she did it to protect her friends and her mother.
Season Four
Klaus ripping Tyler's heart.
In the season premier, Growing Pains, Klaus still in Tyler's body is still in hiding. Bonnie tells him that their agreement was for him to jump into another body, however Klaus learning that his body is still intact, he wants her to put him back in his body. Bonnie tells him she can't right away as she has to use her magic to attempt to bring Elena back to life. Klaus informs her that Elena is no longer his concern, but is convinced to let Bonnie try to save Elena in order to keep the bloodline alive. While waiting, Mrs. Lockwood calls on Tyler's phone and informs Klaus of Caroline being taken. He rescues Caroline, but leaves Rebekah, to "keep them busy" calling her little sister, revealing that he is really Klaus.
After escaping Caroline is happy to see that Tyler is still alive and the two begin making out, however Klaus calls her "love" which leads Caroline to realize that it is really Klaus. They find Bonnie to complete the spell and while she originally refuses to use the dark magic needed, Klaus begins ripping Tyler's heart out forcing Bonnie to do the spell. Later that night, now back in his body, he returns to their home to get the last of Elena's blood, where
Rebekah arrives upset that he saved Caroline, but not her. Rebekah upset over his betray and her realization that he will always choose his hybrids over her, destroys the blood bag. He grabs her and tells her that they are no longer family, he snaps her neck and leaves her on the floor unconscious.
Klaus and Damon team up.
In The Rager, Carol Lockwood calls Klaus and his last remaining hybrids back to Mystic Falls to serve as protection for Tyler. Although Klaus no longer cares, he isn't willing to let one of the few hybrids he has left die. He later meets Hayley, a werewolf who helped Tyler overcome his sire-bond, and discovers that Tyler has been keeping things from Caroline and plans to use them to destroy there relationship. He joins Damon in the trapping and interrogation of Connor Jordan, where he discovers that Connor is part of a mysterious group of vampire hunters known as the Five. He then saves Connor from the explosion and also saves Elena from the werewolf venom she had drunk, claiming that she could be of some use to him after all.
Klaus and Elijah in Italy in 1114
In The Five, Klaus is first seen in the Mystic Grill when Rebekah was flirting on Matt and he told her she was trying to hard. He tried to get her to work with him after he told her the brotherhood of the Five still existed, but she was still mad at him for what had happened. He was later seen talking to Connor, who was tied up in his mansion, asking him for information. When Stefan entered, Klaus started telling him about the past. He remembers of when he was in Italy talking to his brother Elijah when Alexander, one of the Five, showed in front of everyone a vampire, killing him by exposing him to sunlight, but Klaus didn't feel threatened by him. He later convinced Stefan to get Rebekah to his mansion, which he did. The three of them were having dinner when Klaus and Rebekah continue telling Stefan of when Alaxander and the other members of the Five daggered all of the siblings, but due to Klaus' werewolf side, it didn't work on him.
He killed all of the Five and undaggered his siblings, except for Finn. They told Stefan about the existance of the cure, and Klaus said that he tattoo on Connor was going to lead them to it. He brought in Jeremy and ordered him to draw Connor's tattoo since he was the only one who saw it. Then Rebekah got angry after Klaus tells her he still didn't trust her and left. When Klaus later sees Jeremy drawing the tattoo, he gets angry because Jeremy didn't do all of it, but he tells him that it grew each time he killed a vampire, and it wasn't complete yet. He then calls in Nate, one of his hybrids, and tells him to tell the girl to take Jeremy home and told Nate to make sure Connor stayed there and alive. Finally, he was seen again when Rebekah went to the Salvatore Boarding House to talk to Stefan and calls Rebekah a hopeless fool for loving too much, and daggers her.
In The Killer, Klaus was in Italy digging up Alexander's sword. He was first seen when Stefan was talking to him on the phone, telling him that Connor had escaped. He pointed out that Connor had werewolf venom, and since he was half the world away, he couldn't cure anyone since they had no access to his blood. He orders Stefan to make sure that Connor is kept alive at all cost, and also warned him to not tell Damon about the cure.
He was later seen again when they had managed to find the sword. Tyler calls him and tells him to tell him that sending Dean confront Connor was a suicide mission and that he should stop him, but Klaus threatened to tell Caroline about what he thought that Tyler had did with Hayley, so Tyler hung up and told Dean he could do it.
In We All Go A Little Mad Sometimes, Klaus was seen at the Lockwood mansion along with his Hybrids, drinking in honor of Dean’s death. Then after Caroline came to return all of Tyler's things and broke up with Tyler in front of him, he left the place with his hybrids to give them time alone. But as soon he left, it was revealed that Caroline, Hayley and Tyler faked it. Meanwhile, Klaus called Stefan and taunted him about ruining his plans for a hybrid filled future and asked him how Elena was doing with her hallucinations. Then Stefan asked him how he knew about that. Klaus reminded Stefan that he had killed the original five hunters so he knew about it. Then he asked Stefan where he was. Stefan said he was at Elena's place. Klaus came also there and Stefan came out to talk to him and Klaus suggested him to hand over Elena to him else she'll kill herself before the end of the day. Meanwhile, Elena was hallucinating again and started from the house and Klaus took that opportunity to carry her away. Then Klaus put Elena in a windowless room. He said it was for her protection else she would take off her daylight ring & burn herself to death. When Elena said she would never do that Klaus told her she would want to kill herself as he had once and he had to bear the torture for nearly 52 years. But when she asked him how he stopped it and he said it stopped on it's own.
Later, according to Stefan’s plan to rescue Elena from Klaus, Caroline came to distract Klaus when he was drinking at Mystic Grill. Klaus offered Caroline a drink and asked her about the break up. But she brushed off saying that wasn't his business. Then Klaus said that he would never allow Tyler to hurt her if Tyler was sired to him. Stefan texted everything to Caroline after losing Elena again. Caroline then confessed to Klaus that she was really doing and told him that they figured out a way to end the curse. Then Klaus arrived to Lockwood Mansion when Chris was about to leave. He let Jeremy kill Chris and the hunter's curse was broken. Later it was revealed that Klaus gave up on a hybrid (Chris) after Caroline agreed to go on a date with him.
Klaus is a fairly attractive figure. His weight and height are unknown (a true hybrid never reveals his measures). Klaus possesses a curled light-brown hair and light blue eyes that contrasts with his pearl-white skin. As a vampire and a warrior (10th century), his anatomy is well build: not very muscular and ye
t athletic enough. He seems to be tall enough to look eye-to-eye against the Salvatore brothers. Klaus possesses a delicate and yet masculine face, possibly due to the fact that he was once a nobleman in the 15th century, which proves that he enjoys to take care of his figure. Klaus can appear totally shaved (resembling a cherub with a naughty smile) or with several days old beard, which grants him a more mature look.
Klaus clothing style is quite casual, usually seen wearing shirts, jeans and jackets, although he can also use a more classic and refined outfit if the situation requires it (ex.: the ritual of the moonstone; the Original ball thrown by Esther). He uses accessories, such as leather bracelets or necklace as seen in some scenes at the beginning of season 3. Klaus managed to evolve his fashion style ever since the 10th century as he dressed like a warrior, to a more elegant and refined clothing in the 15th century, using his hair longer by then, and also managed to do the exact same thing in the 20s.
While a untriggered, Klaus had a complicated life, he was close with his brothers Elijah and Henrik, and his sister Rebekah, whom he affectionately called Beka. However, he had a strained relationship with his father, Mikael, who was harder on him than on any of his siblings. Klaus even admitted to Rebekah that Mikael frightened him which made him constantly seek his approval without ever finding it. His mother, Esther, often tried to calm Mikael when he became angry with Klaus but she never tried to stop him from humiliating her son. This led him to resent both his parents and possibly to be jealous of his siblings for having their approval.
Original/Hybrid
Personality wise, Klaus is described as sadistic, careless, paranoid, impulsive, emotional, quick-tempered, volatile, manipulative, jealous, obsessive and competitive. Klaus has little to no regard for human life in general, the opposite of his half brother, Elijah, who lives by a moral compass, has compassion and regard for human life and shows ability to feel guilt and remorse for his actions. Despite his negative traits, he has shown to be very protective of his half sister, Rebekah, who stayed by his side for centuries. Unbeknownst to any, Klaus was not the son of Mikael, but of a werewolf in another village which made Klaus both aggressive and angry. When they became vampires, all these emotions were heightened and Klaus's temper became worse than ever. Years of humiliation at Mikael's hands and Esther's supposed indifference, coupled with her rejection of him as her son, led Klaus to kill his own mother in revenge. After this, Klaus shut off his humanity to any but his family, killing any who crossed his path. Vengeful and power-hungry, he will stop at nothing to achieve his ends and remove those who stand in his way. However, Klaus does not believe that death is a punishment as seen when he denies Katherine death, instead keeping her alive so that she will suffer for having betrayed him. He will also place usefulness before pleasure and keeps people alive when it suits his needs. He has also shown a penchant for working with witches which was mentioned by Katherine in Know Thy Enemy. Klaus also has a sense of honor and will not go back on his word although, like his brother Elijah, he will always look for loopholes in the deals he makes. He has also shown a sadistic side notably when he deals with humans or vampires who have crossed him, such as Elena, Damon and Katherine. However, Klaus's hunger for power actually hides a deep fear of being alone which must stem from his father's treatment of him. He wants the hybrids so that he will not be the sole member of his race as Esther intended when she placed the curse on him. He also desires, beyond anything else, to be reunited with friends and family as shown by his desire to have Stefan, his one-time friend, and his family back at his side. He has shown to have a softer side when he is around Caroline. Caroline brings out Klaus humanity.
Powers and Abilities
Vampire/Original Powers
Super Strength - Originals are much stronger than normal vampires, werewolves, hybrids and humans. They are able to decapitate other species with a single chop and shatter windows and doors with small objects. Grow stronger with time. Muscular physique is much more defined and his muscle mass is enhanced.
Super Speed - Originals are much faster than normal vampires, werewolves, hybrids and humans. They are able to stop other supernatural species in their tracks and run miles in mere minutes. Their speed also grows faster with time.
Heightened Senses - Original vampires have extremely enhanced, keen senses of hearing, sight ( also have night vision), smell, and taste. Their senses improve slowly over time.
Super Agility - Originals possess superhuman stamina, flexibility, reflexes, agility, and dexterity. They can move, jump, climb, and run incredibly fast without difficulty or exhaustion. This ability improves slowly over time.
Accelerated Healing - Originals can recover/heal/regenerate from any injury much quicker and more effectively than ordinary vampires, werewolves and humans, in a matter of seconds. Klaus's ability to heal has been accelerated further since his transition to hybrid.
Durability - Originals can take far more trauma than normal vampires, werewolves, hybrids and humans can without much discomfort or injury. Vervain and wood does not seem to weaken them. Invulnerable to harm from high or low temperatures. Original vampires are practically indestructible.
Mind Compulsion - Originals can compel the minds of humans, vampires, and hybrids.
Vervain Detection - They able to detect when vampires and humans are on vervain.
Immortality - Originals do not physically age, they are immune to all forms of illnesses, toxins or poisons, they don't need to eat, drink, or breath, they have eternal youthful beauty with perfect features, flawless smooth skin. They also posses eidetic memory, and cunning intelligence.
Dream Manipulation - Vampires can control dreams and subconscious. The vampires can produce and modify dreams, bestow nightmares or lucid dreaming. Other effects of this ability is the distortion of reality and trapped in the dreams.
Emotional Control - Vampires have a limited degree of control over their own emotions, allowing them to switch off their humanity to make killing easier.
Hybrid Powers
Hybrid Sire Bond - Hybrids are obligated to serve Klaus because his blood created them and have limited free will, along with lack of control.
Werewolf Bite - A bite which is fatal to vampires, bites take effect quicker than a normal werewolf bite.
Werewolf Bite Blood Cure - Only Klaus’ blood is capable of healing a vampire from the bites of a hybrid or werewolf.
Transformation Control - Will go through their first transformation against their will. After that, they will have complete control of their transformation. Elijah informs Klaus that he remained a wolf for 2 days, even when the sun was up. In this state all abilities are enhanced further.File:Hybridenhancment.jpg
Klaus lycanthrope features without transforming
Lycanthrope Enhancement - As seen with Klaus when he bit Katherine, a hybrid is capable of showing its wolf-eyes when displaying its abilities.
Lie Detection - Can sense if someone is lying or not.
Day Walking - Are able to move around during the day.
Weaknesses
White Oak Stake - The only physical weapon that can permanently kill Klaus, It comes from an Ancient White Oak tree during the time of the genesis of The Originals. It was at first thought that the stake used to kill Mikael was the last white oak wood in existence, but it was soon discovered by Rebekah and Klaus that there was a Sapling of the original tree to replace the old.
Uninvited Invitation - In order to enter any house owned by humans, they had to be invited by that person. Once invited the vampire cannot be uninvited. If a vampire lives in a house, other vampires can enter freely and if vampire is in the house without being invited in it will become disoriented and will begin to suffocate.
Esther - Klaus mentions in Bringing Out The Dead that Esther can kill him. Her knowledge of the spell that created vampires and thus ability to reverse it could be the deciding factor in this.
Magic - As a supernatural entity Klaus can be harmed or killed by a witch/warlock that can channel enough power. Considering his level of power however this would likely be very difficult to achieve.
Dessication - Like any vampire lack of blood will immobilize Klaus. This process can be artificially induced by a witch through the use of a dark magic spell which stops a human's heart and having other people make and hold a blood connection to Klaus.
Events Influenced By Klaus' goal of breaking the Curse
Katherine turning into a vampire to avoid being sacrificed. (Katerina)
Rose and Trevor kidnapping Elena so they could get their freedom. (Masquerade, Rose)
Elijah meeting the Petrova Doppelganger. Rose granted freedom while Trevor was decapitated. (Rose)
Elena readying herself to be sacrificed to save her friends. (The Sacrifice, By The Light of the Moon)
Elijah's deal with Elena. (By The Light of the Moon)
The death of Luka, Jonas, and Greta Martin.
Isobel's return to Mystic falls (under compulsion of Klaus) and with the help of Maddox, They retrieve the moonstone, Katherine, and Alaric. After Isobel's job was finished she was compelled by Klaus to take off her necklace and burn to death in the sunlight. (The House Guest, Know Thy Enemy)
Elijah's revival, and trust for Elena. (The Last Dance, Klaus)
The deaths of Jenna, Jules, Elena (resurrected), and John. (The Sun Also Rises)
Allies
Gloria - She was a powerful, 116 year old witch, and also the owner of a bar. Unlike vampires, Gloria is not immortal. Despite her charmingly good looks, and forty-year old appearance, Gloria is the only witch ever known to discover a spell that could decrease the speed of human age. She was killed by Katherine.
Greta Martin - She was a witch. Jonas' daughter and Luka's sister. She is first mentioned in The House Guest by Luka. She is kept by Klaus and that is the reason Jonas and Luka join Elijah in his quest to retrieve the Moonstone but she is present with Maddox in the Alaric´s house and she says she is happy to see Klaus (Alaric´s body). In the episode The Last Day, Greta mentioned she was never "lost" (abducted), it makes clear that her intentions were always to help Klaus. She was killed by Damon.
Maddox - He was a warlock and he's working with Klaus. He is first seen in Know Thy Enemy. He was killed in The Last Day by Damon and Matt.
Hybrids - Hybrids are loyal to Klaus and will seek his acceptance because his blood created them.
Servants
Isobel Flemming - She was a vampire. Isobel was an expert researcher and Elena's mother. She manages to contact Klaus but when she finds him, Klaus compels her to gather information about Mystic Falls (Katherine, Elena, Stefan, Damon, Bonnie, etc.). He then compels her to commit suicide by exposing herself to the sunlight when her job was done.
Stefan Salvatore- After Damon was bitten by a werewolf, Stefan seeks Klaus to find a cure. During the meeting Stefan with Klaus, Klaus reveals the cure is the Klaus´s blood but Klaus manipulates Stefan to serve or else he would not give the cure. Klaus forces Stefan to drink countless bags of human blood as he wanted to awaken Stefan's ripper side. In the end, despite the attempts he had made in the second season to control his blood lust, Stefan gave in to the blood and killed a young girl at Klaus's order. A pleased Klaus then told Stefan that they would be leaving town that night.
Enemies
Mikael - Mikael was searching for Klaus and Rebekah in Gloria's bar and asked Stefan if he knew either of them and where they might be, but under Klaus' compulsion, he says he has never seen them in his life.
Trevor - He was a vampire and a very close friend of Rose. He was killed by Elijah for betraying him by helping Katherine escape from Klaus during the 15th century.
Rose-Marie - She was a vampire and a very close friend of Trevor, she and Trevor tried to stay hidden from Klaus in the 15th century and have both been running from him ever since. Rose unintentionally helped to turn Katherine into a vampire. She then helped both Damon and Stefan to help protect Elena from Klaus and from being in danger. Rose was staked by Damon to keep her from suffering from a werewolf bite.
Elena Gilbert- Elena decided to surrender to Klaus to prevent any of her loved ones from suffering. During the sacrifice, she agreed to help Klaus to break the curse, with the hope that Elijah and Bonnie could destroy him but in the end, Elijah betrayed Elena and the others and he escaped with Klaus.
Damon Salvatore - Damon wanted to protect Elena and Stefan from Klaus, causing him to work with Mason Lockwood and Katerina Petrova to destroy the Originals, once and for all.
Katerina Petrova - Klaus had her under his control, for the purpose of destroying the curse. Klaus finds Katerina in England after being exiled from Bulgaria. Katerina says that Klaus was kind, gentle and caring with her but then she learns that she will be used in a sacrifice and escapes with the moonstone.
Witches - Most witches despise Klaus, possibly due to him being a Vampire. Klaus' mother has even broken the door to the other side to foil his plans. He has, however, had a few allies and friends that were witches.
In the books, Klaus is of unknown age, but is at least from the Bronze Age. He seems to have fought in every major war through time, most notably in Alexander the Great's army, in the Trojan War, and in the wars that led to the Roman Empire's downfall (on the Germanic side). He then decided to stick around the general area of Germany where, sometime in the 15th century. In the books, Klaus was the one who transformed Katherine into a vampire, in the TV series, it ended up being Rose who played the part, and Klaus and Katherine's back stories have been completely changed from the books. Klaus shows great strength and durability at all times of injury and other vampires feared law. For example: Klaus manipulates the mind of Katherine to inform the brothers Salvatore's that he is dead (Katherine kills Klaus centuries ago, because he is no longer useful). Klaus continually avoids Elena messages or visions to Bonnie and Stefan. A vampire must be invited by someone to enter your home, but Klaus enters Vicki's house and violently murdered her without one. Stefan and Damon fight against Klaus, but do not do any harm. In the books, when everyone tries to fight against Klaus, all of the weapons used against him fail. Klaus more or less kills Stefan, and nearly kills Damon as well, until an intervention from Elena's spirit, leading an army's worth of unquiet Civil War ghosts against him. The ghosts carry a screaming Klaus away, and his current whereabouts (and state of being) are unknown.
It was later revealed that when he had attacked Meredith's grandfather before the books started, he had in fact been trying to capture Meredith and her twin brother Cristian. He failed to capture Meredith who became half-human, half-vampire as a result, but got Cristian who became a vampire himself. In the series, he supposedly captured Greta Martin.
Name
German variation of "Nicholas ". From the Greek Νικολαος (Nikolaos) meaning victory of the people. It's the name of a saint who is at the origin of Saint Claus legend.
Trivia
In the novels, the character of Klaus was partially based on Rutger Hauer's character (John Ryder) in the 1986 movie The Hitcher.
John Ryder "The Hitcher": It is not clear where he came from, who he is or what his motivation is, but the one thing that is known is that his name is John Ryder. He has a sadistic drive for killing everyone and anyone he comes across. From what it seems, he is suicidal and he's on the look out for someone to do the task for him.
Given how far back his machinations have stretched, Klaus is more-or-less the main antagonist of the series overall, although he does not appear until the final third of season 2.
Klaus is the Original with the most appearances so far (28).
In the novels, Klaus seems to have fought in every major war through time (Alexander the Great's army, in the Trojan War, and in the wars that led to the Roman Empire's downfall).
In the series, Katherine meets Klaus in England but in the books, Klaus remains in Germany for centuries where Katherine is turned into a vampire.
Klaus seriously affects the life of Katherine in the books and the series. In the books, Klaus controls the mind of Katherine and makes insane, cruel, sadistic, cold, unstable, murders, etc. In the series, Katherine was not transformed by Klaus and was never his student but she is damaged by the abandonment of her daughter, the death of her entire family and the terror of The Originals.
Klaus was said to be the oldest vampire in the history of time in season 2, but it was revealed that Mikael was actually the oldest vampire.
Klaus was revealed to not actually be a full vampire, but instead a half-vampire, half-werewolf hybrid.
Klaus takes the Originals resting place everywhere he goes, but keeps them well hidden at the same time.
In the books, Klaus is weak against the Spirits (Ghosts), because he can´t attack them. In the series, he is also somewhat weak against spirits since it's the power of the dead witches that Bonnie was using to destroy him.
In the books, Klaus was the one who killed Vicki where as, in the series Vicki was turned into a vampire by Damon and then staked by Stefan.
He and Stefan are the only characters to have permanently killed another main character (Jenna and Vicki respectably).
In the novels, never established if Klaus has a ring to walk in the day.
In the novels, Klaus has his first and last battle against Elena, Stefan, Damon, Bonnie, Meredith, Matt and Caroline on the 31st of October. After that, the whereabouts of Klaus and his condition remains a mystery.
Klaus, Isobel, Rose and Katerina are the only characters thus far to have an episode named after them with Klaus being the fourth and first male.
Klaus was introduced to Katherine Pierce on his birthday.
In the novels, Klaus is an Old One and the oldest of all vampires but in the series, Klaus is a Original/Hybrid and the oldest living Werewolf.
In the book, The Return: Midnight, it is said that Klaus had Meredith's twin brother (Cristian). In the series, Greta takes the place of Cristian when she's kidnapped by Klaus.
In the series, Klaus shares similarities with Markus Corvinus of the Underworld film series.
Klaus manages to break the curse using four women of different species: Greta (witch), Jenna (vampire), Jules (werewolf) and Elena (doppelganger).
In the series, he corrupted Stefan like he corrupted Katherine in the books.
Klaus is the first recurring role to be updated to series regular during their sophomore season Season 3.
Klaus, besides Damon Salvatore, has killed the most characters in the series but most of Klaus's kills were off-screen.
Klaus made the insinuation that Elena, Jenna and Jules are goddesses (Maiden, Mother and Crone) for the sacrifice.
Klaus and Tyler are the only living main characters who has never been bitten by a vampire.
In 1492, Klaus had all the elements to break the curse of the sun and the moon, but Katherine manages to escape with the Moonstone.
In the books, Klaus was never human, but a pure blooded vampire, and was very very old in age. In the show he was once human and far younger in age than the books.
Rebekah assumes that Klaus' reasoning for making hybrids is due to his fear of being alone.
In Homecoming, Klaus says "I will kill you and every one, you've ever met" to Stefan, this is how Katherine describes him when he's betrayed or angry. She tells this to Elena and Stefan in Katerina and Damon in The Last Day.
Klaus is a Beatles fan as he said in The Last Dance, claiming that they made the 60s bearable.
Of all the Originals, Klaus can be considered the most vindictive and spiteful.
He was originally supposed to be killed at the end of the third season but Julie Plec decided not to after she saw him acting.
Klaus is the first Original to become a regular.
It appears that Klaus daggers his siblings when they decide to abandon him. He daggered Rebekah for wanting to leave with Stefan . As Kol is a loose cannon he probably wanted to explore the world for himself and was tired of dealing with Klaus so Klaus hunted him down and daggered him too. The only sibling he didn't dagger was Finn, who was daggered by hunters, though Klaus decided not to remove the dagger.
Klaus seems to be a great artist. He even has a landscape painting hanging in the Hermitage museum.
Along with Elena', all Klaus's chances to make more hybrids died. Also, because Elena might ended Petrova bloodline.
Klaus has been portrayed by three actors, the most than any other character in the series:
He is the only one shown to be protective of Rebekah.
Despite the fact that most people call Katherine with the American version(Katherine) of her name both Klaus and Elijah both call her by her original name Katerina.
It is revealed in episode 4x01, Growing Pains, that Klaus' body only survived the White Oak Stake because Alaric closed the coffin immediately after staking Klaus. In order for a fire to burn correctly, it needs access to oxygen. This is explained shortly by Klaus himself (Michael Treviono) "...When I assumed I'd be a pile of ash, but apparently fate and oxygen intervened..."
In Season 4 Klaus doesn't appear in 2 episodes so far: Memorial and We’ll Always Have Bourbon Street.
Tropes
The first time we see Klaus, he has hijacked Alaric's body.
He is introduced as the Big Bad in Season Two. Considering that Big Bad is an abreviation of Big Bad Wolf, and Klaus is a werewolf hybrid, he is also the Big Bad Wolf of Season Two.
Although he looks like 30, he is actually 1000 Years Old .
Sports the coolest example of Perma Stub in the series (at least since Alaric died...)
Rescue the werewolf and vampire and kill the witch that he needs to perform his ritual? Doesn't matter as he's got a back-up of each of them because he is a Crazy PreparedChessmaster .
literally too: he kept his brothers stabbed by silver daggers in coffins and carried them around with him....
He is quite the Manipulative Bastard - he will form alliances whenever it suits his ends. He is a master of manipulating their emotions to get what he wants.
He is strongly protected by Plot Armour - when we think he was dessicated for at least half season (or 20 years like his father) he is back in the SAME EPISODE in a hijacked body!
(To Elena" "The 60’s… wish I could say something good about the sixties, but eh. Actually it kind of sucked, except for the Beatles of course they made it bearable."
(To Katherine in 1492) "Niklaus is the name my father gave me....Please, call me Klaus." -- Klaus
(To Elijah in 1492) "Love is a vampire's greatest weakness, and we are not weak, Elijah. We do not feel, and we do not care." -- Klaus
(To Katherine) "How could you? You betrayed me and fled England before I could even give you the details. But.. I did find your birthplace and I slaughtered your family. So I guess we`re cool." -- Klaus
(To Katherine) "Let`s just hope that Elena isn't as stupid as you were." -- Klaus
(To Katherine) "Do you believe in vampires Jenna?" -- Klaus
(To Katherine) "Now that`s more like it." -- Klaus
(To Alaric) "Thanks for the loan, mate." -- The Last Day
(To Damon) "I thought I remind you and your brother not to do anything you regret." -- The Last Day
(To Damon) "Let me be clear. I have my vampire, I have my werewolf. I have everything I need. The ritual will happen tonight. So if you want to live to see tomorrow, don't screw it up." -- The Last Day
(To Damon) "I thought I remind you and your brother not to do anything you regret." -- The Last Day
(To Elena) "You got me all nervous. I thought you had done something stupid." -- The Last Day
(To Damon) "I`ve heard about you. The crazy, impulsive vampire in love with his brother`s girl. I knew one of you would try to stop me. It was just a 50-50 guess on who." -- The Last Day
(To Stefan) "Well well. I don’t recall you being on the guest list." -- The Sun Also Rises
(To Stefan) "I rather appreciate the sacrifice of three women. Three goddesses sacrificed at nature’s altar." -- The Sun Also Rises
(To Stefan) "Quite the hero, aren’t you? Yeah, I’ve heard that about you." -- The Sun Also Rises
(To Elijah) "Quite the hero, aren’t you? Yeah, I’ve heard that about you." -- As I Lay Dying
(To Stefan) "I heard about this one vampire, crazy bloke, always on and off the wagon for decades. When he was off, he was magnificent. 1917, he went into Monterrey and wiped out an entire migrant village. A true ripper. Sound familiar?" -- As I Lay Dying
(To Stefan) "There it is. You want to save your brother? How 'bout a decade long bender? And I have big plans for you when we leave this town." -- As I Lay Dying
(To Stefan about Katherine) "I've been around a long time, Stefan. I rarely get played for a fool." -- As I Lay Dying
(To Stefan about his Gift) "I could have compelled her to behave, but a real ripper enjoys the hunt." -- As I Lay Dying
Season Three
(To the Blonde Girl) "I promise I'm not a serial killer. I just want to use your phone." -- The Birthday
(To Stefan) "I love it when they run!" -- The Birthday
(To Stefan) "You`ve passed the test, but I knew you still cared for your brother, your old life." -- The Birthday
(To Stefan) "You never stop caring about your family do you? But whenever you feed, the blood makes it easier." -- The Birthday
(To Stefan) "You don't arm yourself when war has been declared, Stefan. You build your army so big, that no one ever dares make the fight." -- The Hybrid
(To Stefan) "I did everything I was told, I should be able to turn them. I broke the curse, I killed a werewolf, I killed a vampire, and I killed the doppelgänger." -- The Hybrid
(To Stefan) "I know how much you loved it here. Bringing back memories of the good old ripper days." -- The End of the Affair
(To Damon) "You don`t have to negotiate your brother`s freedom. When I`m done with him, he don`t wanna come back. '" -- The End of the Affair
(To Rebekah) "Rebekah, it`s your big brother. Come out, come out, wherever you are.'" -- The End of the Affair
(To Stefan ): "I`m not mad, just curious. Rebekah seems to think you`re holding on to something. A piece of your old life. The thing is, she`s got flawless instincts, borderline supernatural. So I thought, I would check it out. See for myself what it is you`ve been hiding. Welcome back to Mystic Falls, Stefan."" -- Disturbing Behavior
(To Bonnie) "You put a rather large kink in my plans, sweetheart. The whole point of breaking the curse and becoming a hybrid was to make more hybrids. I haven`t been able to do that. Now my bet is, it has something to do with the fact that you`re still breathing.." -- The Reckoning
(To Bonnie, Matt and Elena) "I`d like you all to meet my sister: Rebekah. Word of warning... she can be quite mean." -- The Reckoning
(To Bonnie) "If Bonnie`s successful, he`ll live through his transition. Go on, then. Go and fetch your grimoires and enchantments and what-not. I`ll hold on to Elena, for safe-keeping." -- The Reckoning
(To Elena) "It`s always nice to see a vampire in his true element. The species has become such a broody lot." -- The Reckoning
(To Stefan) "Now this is fascinating. I`ve never seen this before. The only thing stronger than your craving for blood is your love for this one girl." -- The Reckoning
(To Rebekah) "You know how much The Original Witch hated me. Do you honestly think I would do anything other than the opposite of what she says?" -- The Reckoning
(To Rebekah) "Yes, go tend the dinner. Leave the blades to the men, little sister."
(To Elena) "I`ll get straight to the point, love. People have been after me for a thousand year and I`m always one step ahead, so whatever it is you`re trying. Go for it, give it your best shot. You won`t succeed."
(To Damon) "You people seem to respond best to violence." -- The New Deal
(To Tyler) "You people seem to respond best to violence." -- The New Deal
(To Tyler) "Human life is just a means to an end. Our means, to our end." -- The New Deal
(To Rebekah's dead body) "Here we are, Rebekah. Home sweet home. Only took a thousand years. And to think, I was counting on you being here with me. But that's all ruined now, isn't it? I'm so sorry, sister. We'll meet again one day." -- The New Deal
(To Caroline) "Do you really think that low of me?."
(To Caroline)"And I could let you, die, if that's what you want, if you really believe your existence has no meaning. I thought about it myself once or twice over the centuries, truth be told. But I'll let you in on a little secret, there's a whole world out there waiting for you, great cities and art and music, genuine beauty, and you can have all of it, you can have a thousand more birthdays. All you have to do is ask." -- Our Town
(To Damon)"Crazy or not. That kind of love never dies." -- Our Town
(To Stefan)"Ah, right. Crazy Stefan. How`s that working out for you? Any friends left?" -- The Ties That Bind
(To Rebekah) "You went after Elena. What is wrong with you?"
(To Caroline ): "Take a chance Caroline. Talk to me. Come on, get to know me. I dare you." -- All My Children
(To Esther ): "Enough. All this talk is boring me. End this now, Mother, or I’ll send you back to Hell." -- All My Children
(To Bonnie ): "There’s Jeremy, playing fetch with his new puppy. Oh, isn’t that just the most adorable thing you’ve ever seen?" -- The Murder of One
(To Bonnie ): "Yeah, you’ll have to excuse the mess. Apparently Damon hurt her feelings. Go on, help him. Save the man who turned your mother into a vampire." -- The Murder of One
(To Stefan ): "So, the fate of the entire vampire race depends on you finding a stake? And to get it we need you to pass out. Which means that I feel totally justified doing this."[breaks Alaric`s neck] ""There sleeping like a baby"" -- Heart of Darkness
(To Stefan ): "That’s a little gratuitous, don’t you think, Stefan? I would have been more gentle."" -- Heart of Darkness
(To Esther) "Your trap failed Mother. I still live and I will go on living and should your beloved spirits try to preserve you again I dare you to come after me. I will build an army so big no one will ever touch me. My survival will haunt you for eternity. You will never destroy me!" --Do Not Go Gentle
(To Jeremy) "Well, for starters, young Jeremy here could show some manners and invite me inside." --Before Sunset
(To Stefan and Damon) ""Hmm..poor lad. Loses one questionable father figure only to be replaced by the likes of the two of you." --Before Sunset
(To Damon) "Oh, I know all about my mother’s invulnerable little creation and that’s why I’m here. I’m leaving town, just need to pick up a few road trip necessities. Spare tire, flashlight, doppelganger." --Before Sunset
(To Stefan and Damon) "Just so we are clear. The sun sets in about eight hours. If we don’t succeed before then, Elena will be dead, I’ll be gone, and the rest of you will be left to fend for yourselves." --Before Sunset
(To Stefan, Damon, and Bonnie) "Before we all walk through these doors, let’s get on the same page, shall we? I was the one who created your vampire bloodline, therefore I am responsible for your lives and Tyler’s life, Caroline’s life, and of course, Abby’s life, should anything go wrong." --Before Sunset
(To Damon) "I’m not lying. But go ahead, call my bluff, let the teacher kill me. You’ll all be dead soon thereafter." --Before Sunset
(To Elena) "You know Stefan blames me for trying to tear him from his brother, but I think we both know who really came between them. You. That’s why you won’t choose. You know once you pick a Salvatore, you’ll destroy their bond." --Before Sunset
(To Elena) "Consider this me doing you a favor. Once you’re dead, you won’t have to choose. No broken hearts. Their family stays intact. But just between us girls, who would you have picked?" --Before Sunset
Season Four
(To Caroline) "Your mouth was all over me, I was an innocent victim!"
(To Rebekah) "I mean it’s pathetic really, isn’t it? How she continues to hand her heart to any man who shows her a hint of affection. You think she would have learned by now from the endless cycle of disappointment and deception."
(To Stefan) "You have the chance to save Elena from the very thing that is going to destroy her. You can call it a deal with the devil if you´ll like. But you know you won´t walk away from it.'"
(To Tyler) "Thought, I'd just pop round to celebrate Dean's successful retrieval of the vampire hunter."
--We All Go A Little Mad Sometimes
(To Hayley) "Maybe you should mind your business, wolf girl."
--We All Go A Little Mad Sometimes
(To Stefan) "The hunter was one of five. We'll find another."
--We All Go A Little Mad Sometimes
(To Stefan) "Have the hallucinations started yet?"
--We All Go A Little Mad Sometimes
(To Stefan) "You know, this would all be a lot more civilized if I was just invited inside."
--We All Go A Little Mad Sometimes
(To Elena) "The hallucinations tend to appear in strange forms. Don't say I didn´t warn you."
--We All Go A Little Mad Sometimes
(To Caroline) ""Caroline, you´re beautiful but if you don’t stop talking I will kill you."
--We All Go A Little Mad Sometimes
(To Stefan) ""She'll need to come with me now. I'll lock her up; keep her away from any, sharp, wooden objects."
--We All Go A Little Mad Sometimes
(To Elena) ""Oh, but you'll want. I did. The problem is, I'm immortal."
--We All Go A Little Mad Sometimes
(To Elena) ""For 52 years, 4 months and 9 days. I was tormented… In my dreams. My every waking moment. Relentless, never-ending torture. It was the only period of my life when I actually felt time."
--We All Go A Little Mad Sometimes
(To Hayley) "Don't tempt me, little wolf."
--We All Go A Little Mad Sometimes
(To Stefan) "In what world do the words "tell no one" mean "tell your brother and every teenage sycophant in town."
--My Brother’s Keeper
(To Stefan) "Well, then I suggest you find some vampires for Jeremy to kill before I’m tempted to offer you up as a victim."
--My Brother’s Keeper
(To Caroline) "Easy love, you’re making a scene."
--My Brother’s Keeper
(To Caroline) "Let's get you a drink. I'll tell you all about being the bad guy."
--My Brother’s Keeper
(To Caroline) "Now, why would I want to cure myself of being the most powerful creature on the planet?"
--My Brother’s Keeper
(To Caroline) "I never answered your question; if I ever thought about being human. Once, I was on a trek in the Andes, and a hummingbird flew up to me. It just hovered there, staring at me, its tiny heart was pattering like a machine gun. And I thought, what a thing, you know, to have to work that hard every day just to stay alive. To be constantly on the verge of death and how satisfying every day must be that it survived. And that was the only time I thought about being human."
--My Brother’s Keeper
(To Stefan) "I prefer to think of it as an espression of post-modernisme."
(To Stefan) ""Loneliness Stefan, that's why you and I memorialize our dead. There's the briefest of moments where we hold their life in our hands and then we rip it away and we're left with nothing. So gathering other peoples letters or writing their names on a wall is a reminder that we are left infinitely and utterly alone.""
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Niklaus Mikaelson has a photo gallery.