The Spooky Tale of Captain Underpants: Hack-a-ween Where are all of the Halloween decorations? When Melvin tries to cancel Halloween, clever best friends Harold and George create their own spooky holiday -- and it's a huge success! Details Casts Videos Galleries Posters Title The Spooky Tale of Captain Underpants: Hack-a-ween Release Date 2019-10-08 Runtime 00 Hours 46 Minutes Genres Comedy Animation Family Production Companies Scholastic Productions, Titmouse, Treehouse Comix, DreamWorks Animation Television Production Countries United States of America Nat Faxon... Captain Underpants / Mr. ... Jay Gragnani... Harold (voice)... Ramone Hamilton... George (voice)... Sean Astin... Narrator / Mr Gigglenose ... Dayci Brookshire... Jessica / Dressy (voice)... Clancy Brown... Mr. Ree (voice)... Jorge Diaz... Melvin / Stanley Peet / M... Peter Hastings... Comic Narrator (voice)... Evan Kishiyama... Steve "Gooch" Yamaguchi (... David Koechner... Mr. Meaner (voice)... Erica Luttrell... Erica / George's Mom (voi... Patty Mattson... Miss Anthrope / Harold's ... Brennan Murray... Bo Hweemuth (voice)... Kevin Michael Richardson... Diddlysaurus / George's D... Mindy Sterling... Melvin's Mom (voice)... Stephen Tobolowsky... Creepy Rattlechains (voic... Kari Wahlgren... Mayor Hoppy McChapper (vo... Hack-A-Ween Trailer 🎃 The Epic Tales of Captain Underpants | Netflix (Trailer) Original Size (2048x1152) Original Size (1000x1500) Original Size (710x1097) Original Size (600x900) Original Size (1400x2100) Original Size (2000x3000)