18 Years Later, It's Always Sunny Still Hasn't Topped Its Best Episode

It’s Always Sunny in Philadelphia has aired a whopping 17 seasons since its modest debut on FX way back in 2005. All those years ago, the show didn’t make a huge splash at first. But it was so cheap to produce that the network gave it time to find its feet, and by its third or fourth season, it had become one of the best comedies on TV. Throughout its heyday, It’s Always Sunny amassed a passionate cult fan base that has since turned it into one of the longest-running sitcoms in television history.