The fifth season of It’s Always Sunny in Philadelphia, premiered on FX on September 17, 2009. The season contains 12 episodes and concluded airing on December 10, 2009.
5 - 1The Gang Exploits the Mortgage Crisis Sep. 17, 2009
5 - 2The Gang Hits the Road Sep. 24, 2009
5 - 3The Great Recession Oct. 01, 2009
5 - 4The Gang Gives Frank an Intervention Oct. 08, 2009
5 - 5The Waitress Is Getting Married Oct. 15, 2009
5 - 6The World Series Defense Oct. 22, 2009
5 - 7The Gang Wrestles for the Troops Oct. 29, 2009
5 - 8Paddy's Pub: Home of the Original Kitten Mittens Nov. 05, 2009
5 - 9Mac and Dennis Break Up Nov. 12, 2009
5 - 10The D.E.N.N.I.S. System Nov. 19, 2009
5 - 11Mac and Charlie Write a Movie Dec. 03, 2009
5 - 12The Gang Reignites the Rivalry Dec. 10, 2009