So far, this season of "It's Always Sunny in Philadelphia" has exemplified much of what the series does best. It kicked off with a sequel to one of its most popular episodes, reminding fans of how creator Rob McElhenney and fellow writers/producers Glenn Howerton and Charlie Day often reward long-term viewers for their devotion. In the same vein, Season 11 also included a redo, of sorts, when Frank got hit on the head and started reliving the episode when he first joined the gang — a meta-callback to redundancies implemented a few times prior. Paddy's gang also tried to scam some folks in last week's episode, "Dee Made a Smut Film," which is another popular trope of these hard-drinking dreamers. Read More: Watch: 'Archer' Season 7 Teaser is The Greatest Event in Television History But it's the two other episodes of this young season that best epitomize what "It's Always Sunny in Philadelphia" does best.