Supernatural season 4 has 22 episode guides and currently identifies 82 soundtrack songs.
Supernatural season 4 episodes
Episode 1
Sep 18, 2008
11 songs
Episode 2
Sep 25, 2008
2 songs
Episode 3
Oct 02, 2008
6 songs
Episode 4
Oct 09, 2008
1 song
Episode 5
Oct 16, 2008
17 songs
Episode 6
Oct 23, 2008
2 songs
Episode 7
Oct 30, 2008
3 songs
Episode 8
Nov 06, 2008
3 songs
Episode 9
Nov 13, 2008
2 songs
Episode 10
Nov 20, 2008
1 song
Episode 11
Jan 15, 2009
2 songs
Episode 12
Jan 22, 2009
3 songs
Episode 13
Jan 29, 2009
1 song
Episode 14
Feb 05, 2009
9 songs
Episode 15
Mar 12, 2009
2 songs
Episode 16
Mar 19, 2009
2 songs
Episode 17
Mar 26, 2009
4 songs
Episode 18
Apr 02, 2009
4 songs
Episode 19
Apr 23, 2009
3 songs
Episode 20
Apr 30, 2009
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Episode 21
May 07, 2009
1 song
Episode 22
May 14, 2009
3 songs