Supernatural 4x21
When the Levee Breaks
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.
Supernatural season 4
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4x1Lazarus Rising Sep 18, 2008 -
4x2Are You There, God? It's Me, Dean Winchester Sep 25, 2008 -
4x3In the Beginning Oct 02, 2008 -
4x4Metamorphosis Oct 09, 2008 -
4x5Monster Movie Oct 16, 2008 -
4x6Yellow Fever Oct 23, 2008 -
4x7It's the Great Pumpkin, Sam Winchester Oct 30, 2008 -
4x8Wishful Thinking Nov 06, 2008 -
4x9I Know What You Did Last Summer Nov 13, 2008 -
4x10Heaven and Hell Nov 20, 2008 -
4x11Family Remains Jan 15, 2009 -
4x12Criss Angel Is A Douchebag Jan 22, 2009 -
4x13After School Special Jan 29, 2009 -
4x14Sex and Violence Feb 05, 2009 -
4x15Death Takes a Holiday Mar 12, 2009 -
4x16On the Head of a Pin Mar 19, 2009 -
4x17It's a Terrible Life Mar 26, 2009 -
4x18The Monster at the End of this Book Apr 02, 2009 -
4x19Jump the Shark Apr 23, 2009 -
4x20The Rapture Apr 30, 2009 -
4x21When the Levee Breaks May 07, 2009 -
4x22Lucifer Rising May 14, 2009