Rob McElhenney is one of the hardest-working guys in TV right now. Not only is he one of the main stars of the history-making FX sitcom, “It’s Always Sunny In Philadelphia,” which is about to begin production on episodes for Season 15, but he’s also the co-creator, co-writer, director, and star of the Apple TV+ series, “Mythic Quest.” And on top of that, he took the time out of his busy day in the writers room for ‘Sunny’ to join The Playlist Podcast.