Season 4, Episode 21 When the Levee Breaks
First Aired: May 7, 2009
Sam is locked inside Bobby's panic room to allow him to detox from demon blood, but Bobby wants to free him early to help fight in the anticipated apocalypse. Dean disagrees and seeks help from Castiel.
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- Premiered: September 21, 2006
- Rating: TV-14
- Premise: Two brothers hunt demons, ghosts and other supernatural entities as they investigate crimes caused by paranormal forces. (more)
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The show gave the perfect shoutout to Papa Winchester (Jeffrey Dean Morgan).