"2020: A Year In Review" is the first episode of the fifteenth season of the American sitcom television series It's Always Sunny in Philadelphia. It is the 155th overall episode of the series and was written by series developers, executive producers and lead actors Rob McElhenney, Charlie Day, and Glenn Howerton and directed by Todd Biermann. It originally aired on FXX on December 1, 2021, airing back-to-back with the follow-up episode, "The Gang Makes Lethal Weapon 7".