The 6 season of It's Always Sunny in Philadelphia was broadcast on FXX from jeudi 16 septembre 2010 to jeudi 16 décembre 2010. It consists of 13 episodes, the first one is called "Mac Fights Gay Marriage" and the last one "A Very Sunny Christmas".
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.