The Gang returns... mostly.... in the 13th Season of the FXX original comedy series IT'S ALWAYS SUNNY IN PHILADELPHIA. Mac (Rob McElhenney), Charlie (Charlie Day), Dee (Kaitlin Olson) and Frank (Danny DeVito) return to their duplicitous, scheming ways at Paddy's Pub, while Dennis (Glenn Howerton) takes on the new role of father in North Dakota. Last season, the Gang experienced new highs - Mac acknowledged his sexuality and Charlie conv | It's Always Sunny In Philadelphia:the Complete Season 13 | DVD | Best Buy