Smallville season 4 has 22 episode guides and currently identifies 160 soundtrack songs.
Smallville season 4 episodes
Episode 1
Sep 22, 2004
7 songs
Episode 2
Sep 29, 2004
9 songs
Episode 3
Oct 06, 2004
8 songs
Episode 4
Oct 13, 2004
10 songs
Episode 5
Oct 20, 2004
7 songs
Episode 6
Oct 27, 2004
1 song
Episode 7
Nov 03, 2004
7 songs
Episode 8
Nov 10, 2004
8 songs
Episode 9
Nov 17, 2004
5 songs
Episode 10
Dec 01, 2004
1 song
Episode 11
Jan 26, 2005
9 songs
Episode 12
Feb 02, 2005
5 songs
Episode 13
Feb 09, 2005
8 songs
Episode 14
Feb 16, 2005
5 songs
Episode 15
Feb 23, 2005
3 songs
Episode 16
Mar 02, 2005
10 songs
Episode 17
Apr 13, 2005
1 song
Episode 18
Apr 20, 2005
12 songs
Episode 19
Apr 27, 2005
9 songs
Episode 20
May 04, 2005
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Episode 21
May 11, 2005
5 songs
Episode 22
May 18, 2005
30 songs