Supernatural: Season 2, Episode 14 - ProjectFreeTV

2 - 14: Born Under a Bad Sign

After receiving a frantic call from Sam, who has been missing for over a week, Dean races to his brother's side. He finds Sam covered in blood, but unable to remember anything that happened. Upon investigation, the brothers are horrified to discover a tape that shows Sam killing another hunter in cold blood, causing Sam to believe his evil side is finally taking over.