Season 4
Resurrection. After enduring unspeakable torture, Dean escapes from Hell, rescued by an all-powerful creature he's never seen before an Angel a warrior of God who recruits Sam and Dean in Heaven's battle against Hell. And there are whispers that a certain fallen angel will soon be freed from his prison deep in Hell: Lucifer. If Sam and Dean can't stop it if Lucifer walks free he'll bring on the Apocalypse. Meanwhile, the Winchester brothers reunite and hit the road, battling the supernatural wherever they go. They encounter demons, spirits, Dracula himself and even a drunk, heavily armed seven-foot-tall teddy bear. All the while, the ultimate war draws them into its horror. Caught between Heaven and Hell, between God and the Devil, the Winchester brothers must battle for the future of humankind.
Episodes
1 Lazarus Rising Sep 18, 2008 
2 Are You There, God? It's Me, Dean Winchester Sep 25, 2008 
3 In the Beginning Oct 2, 2008 
4 Metamorphosis Oct 9, 2008 
5 Monster Movie Oct 16, 2008 
6 Yellow Fever Oct 23, 2008 
7 It's the Great Pumpkin, Sam Winchester Oct 30, 2008 
8 Wishful Thinking Nov 6, 2008 
9 I Know What You Did Last Summer Nov 13, 2008 
10 Heaven and Hell Nov 20, 2008 
11 Family Remains Jan 15, 2009 
12 Criss Angel Is a Douchebag Jan 22, 2009 
13 After School Special Jan 29, 2009 
14 Sex and Violence Feb 5, 2009 
15 Death Takes a Holiday Mar 12, 2009 
16 On the Head of a Pin Mar 19, 2009 
17 It's a Terrible Life Mar 26, 2009 
18 The Monster at the End of this Book Apr 2, 2009 
19 Jump the Shark Apr 23, 2009 
20 The Rapture Apr 30, 2009 
21 When the Levee Breaks May 7, 2009 
22 Lucifer Rising May 14, 2009