"The Gang Gets Successful" is the unaired episode of It's Always Sunny in Philadelphia which is originally was produced for Season 6. This episode has a production code XIP06004. It was directed by Randall Einhorn (and likely written by Scott Marder). The 7th Season episode "How Mac Got Fat" mostly featured scenes from this episode. Also, a few scenes from the episode are being included in promotional material for Season 6.