20 Best 'It's Always Sunny in Philadelphia' Episodes
The cast of 'It's Always Sunny in Philadelphia.' Matthias Clamer/FXX

It started as a lo-fi farce thrown together by four young actors, all of whom had been stuck in bit parts; funny or not, you wouldn't have thought this comedy would have lasted a single season at first glance. Fast forward to almost a decade later, and It's Always Sunny in Philadelphia has gone from cult favorite to one of the flagship shows on FX (and now FXX), displaying a sensibility unlike anything else on television — relying on lightning-speed banter, crazy schemes, and a "can you top this?" sense of shamelessness.

For 10 seasons, the series had mined comic gold from the execrable behavior of the owners of Paddy's Pub: burly, sweet, self-deluded Mac (Rob McElhenny); resourceful slob Charlie (Charlie Day); cynical lothario Dennis (Glenn Howerton); his sad-sack sister "Sweet" Dee (Kaitlin Olson); and libertine troll Frank (Danny DeVito, who joined in the second season). You may not particularly like these folks. They will, however, always make you laugh.

These 20 episodes represent "the gang" at their most appalling — which, not coincidentally, is also when they're at their most hilarious. Wild card, bitches!