Supernatural: Season 4 Episode 16: On the Head of a Pin
Starring: Jared Padalecki, Jensen Ackles, Jim Beaver, Genevieve Padalecki, Misha Collins, Traci Dinwiddie, Scott Parsons
Length: 43 minutes
Supernatural: S04E16 Description: Castiel and Uriel ask Dean to torture Alastair for information. But when Alastair breaks free, Castiel starts to believe that there is a traitor among the angels.