Credit: Patrick McElhenney/FX When It’s Always Sunny in Philadelphia debuted on FX in 2005, it arrived with little fanfare and even less polish. Shot on a shoestring budget, the pilot was a scrappy, crude comedy about three narcissistic bar owners in South Philly. Philadelphia Inquirer critic Jonathan Storm called it “Seinfeld on crack,” but the show slowly built a cult following, thanks in part to its absurd plotlines, and the addition of Danny DeVito in the second season.