Capitaine Superslip et l'artefact abandonné des aliens absents

Nat Faxon

Captain Underpants / Mr. Krupp (voice)

Jay Gragnani

Harold (voice)

Ramone Hamilton

George (voice)

Sean Astin

Narrator (voice)

Peter Hastings

Comic Narrator (voice)

Nolan North

Dr. Shifty Fitzgibbons / Jett Wingman (voice)

Gary Anthony Williams

Dupe Licitous (voice)

Secunda Wood

Moxie Swaggerman / Hailey Comett (voice)

Peter Hastings

Garg (voice)

David Koechner

Mr. Meaner / Sqworg (voice)