Silas is bartering Katherine for Stefan to Damon....Damon who knew that's were Stefan was going. Even if Stefan was not there, checkout how the hell Silas escaped for god sake!! But judging by his first reaction to seeing Stefan/Silas...I can see why Damon is in no hurry to be his once 'get the job done' self.
Elena dreaming of Stefan, Caroline pointing out that its just guilt. What....is that the writers way of explaining why a once 'always in your business' Elena wont check up one him. Watch once he is out she'll be warming his feeding bottles and singing him to sleep.