FX's long-running, generally depraved comedy "It's Always Sunny in Philadelphia" will be moving to the network's new spinoff channel FXX in September for its ninth and tenth seasons, and to tout the move Rob McElhenney, Glenn Howerton, Charlie Day, Kaitlin Olson and Danny DeVito have looked to an unexpected inspiration -- deeply serious Scandinavian art film. Ingmar Bergman's the odd but amusing main influence on the promos below -- we're particularly fond of the "Seventh Seal"-citing "Door."