The Simpsons Season 21, Episode 1 Homer the Whopper Family Animation Comedy IMDB 8 Country United States Duration 22 min Air Date 2009-09-27 Actors Dan Castellaneta (Homer Simpson / Abe Simpson / Barney Gumble / Krusty (voice)) Julie Kavner (Marge Simpson / Patty Bouvier / Selma Bouvier (voice)) Nancy Cartwright (Bart Simpson / Nelson Muntz / Ralph Wiggum (voice)) Yeardley Smith (Lisa Simpson (voice)) Hank Azaria (Moe Szyslak / Chief Wiggum / Apu / Comic Book Guy / Carl (voice)) Harry Shearer (Ned Flanders / Mr. Burns / Smithers / Skinner / Lenny (voice)) Overview Homer gets the lead in a movie about a superhero who can take on the powers of every superhero in any comic book he touches. To whip Homer into superhero shape, the studio hires a celebrity fitness trainer.