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.
4 - 1Mac and Dennis: Manhunters Sep. 18, 2008
4 - 2The Gang Solves the Gas Crisis Sep. 18, 2008
4 - 3America’s Next Top Paddy’s Billboard Model Contest Sep. 25, 2008
4 - 4Mac’s Banging the Waitress Sep. 25, 2008- 4 - 4Mac’s Banging the Waitress Sep. 25, 2008
4 - 5Mac and Charlie Die (1) Oct. 02, 2008- 4 - 5Mac and Charlie Die (1) Oct. 02, 2008
4 - 6Mac and Charlie Die (2) Oct. 02, 2008- 4 - 6Mac and Charlie Die (2) Oct. 02, 2008
4 - 7Who Pooped the Bed? Oct. 09, 2008- 4 - 7Who Pooped the Bed? Oct. 09, 2008
4 - 8Paddy’s Pub: The Worst Bar in Philadelphia Oct. 16, 2008- 4 - 8Paddy’s Pub: The Worst Bar in Philadelphia Oct. 16, 2008
4 - 9Dennis Reynolds: An Erotic Life Oct. 23, 2008- 4 - 9Dennis Reynolds: An Erotic Life Oct. 23, 2008
4 - 10Sweet Dee Has a Heart Attack Oct. 30, 2008- 4 - 10Sweet Dee Has a Heart Attack Oct. 30, 2008
4 - 11The Gang Cracks the Liberty Bell Nov. 06, 2008- 4 - 11The Gang Cracks the Liberty Bell Nov. 06, 2008
4 - 12The Gang Gets Extreme: Home Makeover Edition Nov. 13, 2008- 4 - 12The Gang Gets Extreme: Home Makeover Edition Nov. 13, 2008
4 - 13The Nightman Cometh Nov. 20, 2008- 4 - 13The Nightman Cometh Nov. 20, 2008