Two fourth-graders (voiced by Kevin Hart and Thomas Middleditch) hypnotize their principal (Ed Helms) in order to transform him into Captain Underpants, the superhero from their homemade comic book. The trio soon battle a new teacher at their school (Nick Kroll), who's secretly a mad scientist. This animated comedy was adapted from the series of children's novels by Dav Pilkey, and also features the voices of Jordan Peele and Kristen Schaal.