George and Harold and their doubles, Yesterday George and Yesterday Harold, have been taking turns going to school, but when the doubles fall prey to their gym teacher, Mr. Meaner, and his method of mind control that turns students into attentive, obedient, perfect children, it is up to original George and Harold to strike back. Jorge, Berto y sus dobles, Jorge y Berto de Ayer, la están pasando muy bien. Dos de ellos van a la escuela mientras los...

A snotty situation ensues when Melvin Sneedley, an academically-gifted student, turns into the Bionic Booger Boy and must be stopped by George, Harold, and Captain Underpants.

When Professor Pippy P. Poopypants comes to Jerome Horwitz Elementary School to teach science, and he goes off the deep end because students make fun of his name, only Captain Underpants can save the school from the professor's perilous plot.

The newest hero from the creator of Captain Underpants hasn't always been a paws-itive addition to the police force. While he can muzzle miscreants, he tends to leave a slick of slober in his wake! This time Petey the cat's dragged into a tiny bit of trouble--a double in the form of a super-cute kitten.

Principal Krupp once again turns into the superhero, Captain Underpants, in order to save the world and Jerome Horowitz Elementary School from the evil talking toilets.