'The Simpsons': 24 years of season premieres

In the 21st season premiere episode co-written by Seth Rogen, Comic Book Guy casts Homer as the lead in "Everyman," a feature film based on the new comic book superhero he created. To whip him into shape for the part, the movie studio hires celebrity fitness trainer Lyle McCarthy (guest voice Rogen) but Homer has trouble sticking to his new, healthy regimen.