Season
- Season 0 1970-01-01
- Season 1 2005-09-13
- Season 2 2006-09-28
- Season 3 2007-10-04
- Season 4 2008-09-18
- Season 5 2009-09-10
- Season 6 2010-09-24
- Season 7 2011-09-23
- Season 8 2012-10-03
- Season 9 2013-10-08
- Season 10 2014-10-07
- Season 11 2015-10-07
- Season 12 2016-10-13
- Season 13 2017-10-12
- Season 14 2018-10-11
- Season 15 2019-10-10
Season 15 Episode
- Season 4 Lazarus Rising
- Season 4 Are You There, God? It's Me, Dean Winchester
- Season 4 In the Beginning
- Season 4 Metamorphosis
- Season 4 Monster Movie
- Season 4 Yellow Fever
- Season 4 It's the Great Pumpkin, Sam Winchester
- Season 4 Wishful Thinking
- Season 4 I Know What You Did Last Summer
- Season 4 Heaven and Hell
- Season 4 Family Remains
- Season 4 Criss Angel Is a Douchebag
- Season 4 After School Special
- Season 4 Sex and Violence
- Season 4 Death Takes a Holiday
- Season 4 On the Head of a Pin
- Season 4 It's a Terrible Life
- Season 4 The Monster at the End of this Book
- Season 4 Jump the Shark
- Season 4 The Rapture
- Season 4 When the Levee Breaks
- Season 4 Lucifer Rising
Supernatural - Season 4 Episode 21 When the Levee Breaks
8.30 45 minutes Dean and Bobby have something frightening locked in Bobby's panic room: Sam, who is corrupted by demon blood. With the apocalypse drawing nearer, Bobby wants to free Sam to fight on their side.
