OPIS
When Melvin tries to cancel Halloween, clever best friends Harold and George create their own spooky holiday -- and it's a huge success!
- Nat FaxonCaptain Underpants / Mr. Krupp (voice)
- Jay GragnaniHarold (voice)
- Ramone HamiltonGeorge (voice)
- Sean AstinNarrator / Mr. Gigglenose (voice)
- Dayci BrookshireJessica / Dressy (voice)
- Clancy BrownMr. Ree (voice)
- Jorge DiazMelvin / Stanley Peet / Melvin's Dad (voice)
- Peter HastingsComic Narrator (voice)