In this interactive special, Harold and George need your decision-making skills to stop Krupp from blowing their beloved treehouse to smithereens.
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Captain Underpants / Mr. Krupp / Buffalobe (voice)
Harold Hutchins (voice)
George Beard / Young Mr. Cleveland (voice)
Narrator / Putter Mulligan (voice)
Jessica / Dressy / Smartaconda (voice)
Melvin / Stanley Peet (voice)
Benjamin Franklin (voice)
Comic Narrator / Marlin (voice)
Steve 'Gooch' Yamaguchi (voice)
Mr. Meaner (voice)
Mr. Cleveland / Viper Chai (voice)
Erica (voice)
