Meet Captain Underpants! His true identity is so secret, even he doesn't know who he is! Professor Pippy P Poopypants may be the greatest scientific genius the world has ever known. Unfortunately he has such a silly name that nobody takes him seriously! Needless to say, George and Harold poo-poo Poopypants' pride - practically pulverising it - and Poopypants is preparing to pounce! This looks like a job for Captain Underpants . . .