- Jared Padalecki (Sam Winchester)
- Jensen Ackles (Dean Winchester)
- Misha Collins (Castiel)
Supernatural — S4E21
Episode: When the Levee Breaks
Air Date: 2009-05-07
Runtime: 43 min
Overview
Dean and Bobby have something frightening locked in Bobby's panic room: Sam, who is corrupted by demon blood. With the apocalypse drawing nearer, Bobby wants to free Sam to fight on their side.