Fourth-grade friends George and Harold have a shared love of pranks and comic books -- and turning their principal into an undies-wearing superhero.
Nat Faxon
Captain Underpants / Mr. Krupp (voice)
39 episodes
Jay Gragnani
Harold (voice)
39 episodes
Ramone Hamilton
George (voice)
39 episodes
Sean Astin
Narrator (voice)
39 episodes
Peter Hastings
Comic Narrator (voice)
39 episodes
Jorge Diaz
Melvin (voice)
39 episodes
Dayci Brookshire
Jessica / Dressy (voice)
39 episodes
Evan Kishiyama
Steve 'Gooch' Yamaguchi (voice)
39 episodes
Erica Luttrell
Erica (voice)
8 episodes
Laraine Newman
Ms. Ribble (voice)
8 episodes
Extinct or Alive
