Supernatural Season 4 Episode 21
Overview
Dean and Bobby have something frightening locked in Bobby’s panic room: Sam, contaminated by demon blood. But as the apocalypse draws nearer, Bobby wants to free Sam to battle on their side.
Director: Robert Singer
Guest Star: Christopher Heyerdahl, Colin Ford, Genevieve Padalecki, Jim Beaver, Joey Bothwell, Juliana Wimbles, Julie McNiven, Misha Collins, Samantha Smith