When Melvin tries to cancel Halloween, clever best friends Harold and George create their own spooky holiday -- and it's a huge success!
Unfortunately the movie The Spooky Tale of Captain Underpants: Hack-a-ween is not yet available on HBO Max.
Writing | Dav Pilkey | Novel |
Writing | Mark Banker | Writer |
Directing | Seung Woo Cha | Director |
Directing | Kevin Peaty | Director |
Writing | Matt Smith | Writer |