Supernatural - S4E21

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When The Levee Breaks

Series 4, episode 21

Written by Eric Kripke, Sera Gamble

Directed by Robert Singer

Originally Aired On: Thursday, 07 May

US drama about two brothers who investigate paranormal events. Sam is locked inside Bobby's panic room to free his body from demon blood. But when events outside start getting serious, Bobby wants to release him, and Dean is forced to ask Castiel for help.

Click to see when When The Levee Breaks is coming up on TV: UK, USA

Cast

	Jared Padalecki		Sam Winchester
	Jensen Ackles		Dean Winchester
	Jim Beaver		Bobby Singer
	Genevieve Cortese		Ruby
	Misha Collins		Castiel
	Julie McNiven		Anna
	Christopher Heyerdahl		Alastair
	Colin Ford		Young Sam Winchester
	Samantha Smith		Mary Winchester
	Juliana Wimbles		Demon