Supernatural - Season 4 Episode 21 When the Levee Breaks

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Supernatural - Season 4 Episode 21 When the Levee Breaks
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Title:Supernatural - Season 4 Episode 21 When the Levee Breaks
Genre: Drama, Mystery, Sci-Fi & Fantasy
Air Date: 2009-05-07
Season Number: 4
Episodes Number: 21
Guest Stars: Colin Ford (Young Sam Winchester), Julie McNiven (Anna Milton), Christopher Heyerdahl (Alastair), Juliana Wimbles (Demon Nurse), Joey Bothwell (Nurse), Genevieve Padalecki (Ruby), Samantha Smith (Mary Winchester), Misha Collins (Castiel), Jim Beaver (Bobby Singer)
Stars: Jensen Ackles (Dean Winchester), Jared Padalecki (Sam Winchester),
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.
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