A lifelong nuisance to Dee and Dennis Reynolds, Gail “The Snail” is so disgusting that she even sicks Charlie out. And he walks around in sewers. Gail debuted in one of Sunny‘s very best episodes: ...

"It's Always Sunny in Philadelphia" originally began airing on FX in 2005, and since then, it's become a ginormous, influential hit — and the longest-running live-action American sitcom of all time, ...