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!

• 
  Nat Faxon

  Captain Underpants / Mr. Krupp (voice)
• 
  Jay Gragnani

  Harold (voice)
• 
  Ramone Hamilton

  George (voice)
• 
  Sean Astin

  Narrator / Mr Gigglenose (voice)
• 
  Dayci Brookshire

  Jessica / Dressy (voice)
• 
  Clancy Brown

  Mr. Ree (voice)
• 
  Jorge Diaz

  Melvin / Stanley Peet / Melvin's Dad (voice)
• 
  Peter Hastings

  Comic Narrator (voice)
• 
  Evan Kishiyama

  Steve 'Gooch' Yamaguchi (voice)
• 
  David Koechner

  Mr. Meaner (voice)