Plot: The fourth season of It's Always Sunny in Philadelphia, premiered on FX on September 18, 2008. The season contains 13 episodes and concluded airing on November 20, 2008
It's Always Sunny In Philadelphia - Season 4
First Episode Aired On:
Thursday, September 18 2008
16 years ago
Thursday, September 18 2008
16 years ago
Last Episode Aired On:
Thursday, November 20 2008
16 years ago
Thursday, November 20 2008
16 years ago
Number of Episodes: 13