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The Spooky Tale of Captain Underpants: Hack-a-ween

When Melvin tries to cancel Halloween, clever best friends Harold and George create their own spooky holiday -- and it's a huge success!

Captain Underpants / Mr. Krupp (voice)

Harold (voice)

George (voice)

Narrator / Mr Gigglenose (voice)

Jessica / Dressy (voice)

Mr. Ree (voice)

Melvin / Stanley Peet / Melvin's Dad (voice)

Comic Narrator (voice)

Steve "Gooch" Yamaguchi (voice)

Mr. Meaner (voice)

Erica / George's Mom (voice)

Miss Anthrope / Harold's Mom (voice)

Bo Hweemuth (voice)

Diddlysaurus / George's Dad (voice)

Melvin's Mom (voice)

Creepy Rattlechains (voice)

Mayor Hoppy McChapper (voice)