The 5 season of It's Always Sunny in Philadelphia was broadcast on FXX from jeudi 17 septembre 2009 to jeudi 10 décembre 2009. It consists of 12 episodes, the first one is called "The Gang Exploits the Mortgage Crisis" and the last one "The Gang Reignites the Rivalry".
Four egocentric friends who run a neighborhood Irish pub in Philadelphia try to find their way through the adult world of work and relationships. Unfortunately, their warped views and precarious judgments often lead them to trouble, creating a myriad of uncomfortable situations that usually only get worse before they get better.