 Castiel shows remorse for his previous actions and initially wants to leave, but Dean is able to convince him to help by giving him back his trench coat.Castiel finds Sam in time to save him from a demon torturing him to death with electro-shock therapy and tries to restore his mental wall, but can't as it's completely gone.Feeling sorry for what he had done, Castiel transfers the problem to himself and is haunted by visions of Lucifer like Sam was.