Plot: Two overly imaginative pranksters named George and Harold, hypnotize their principal into thinking he's a ridiculously enthusiastic, incredibly dimwitted superhero named Captain Underpants. Storyline: Storyline Two overly imaginative pranksters named George and Harold, hypnotize their principal into thinking he's a ridiculously enthusiastic, incredibly dimwitted superhero named Captain Underpants. Plot Summary | Plot Synopsis Plot Keywords: underwear | grade school | character name in title | principal | superhero | See All (11) » Taglines: Putting the "Mighty" in "Tighty Whitey". See more » Genres: Animation | Action | Comedy | Family Motion Picture Rating (MPAA) Rated PG for mild rude humor throughout | See all certifications » Parents Guide: View content advisory » ImDb