Frank Carlson Library

Principal Krupp once again turns into the superhero Captain Underpants in order to save the world, and Jerome Horwitz Elementary School, from the evil talking toilets and the Turbo Toilet 2000.

Having changed the course of human history after unwittingly wondering what could be worse than going to prison, George and Harold are shot through time back to kindergarten, where they are subjected to bullying and a clueless school principal.

George and Harold, and their doubles, Yesterday George and Yesterday Harold, have a good thing going. Two of them go to school, while the other two hide in the tree house and play video games all day-then they switch! But when their malicious gym teacher, Mr Meaner, creates a method of mind control that turns their fellow students into attentive, obedient, perfect children, the future of all humanity will be in their hands!

George and Harold are forced to contemplate a world without Captain Underpants.

When we last saw our heroes George and Harold, they had been turned into evil zombie nerds doomed to roam a devastated, post-apocalyptic planet for all eternity. Tippy Tinkletrousers and this time-traveling hijinks prevented George and Harold from creating Captain Underpants in the first place! Now, having changed the course of human history forever, they'll have to figure out a way to change it back.

George and Harold encounter a familiar face--Professor Poopypants! He now goes by the name Tippy Tinkletrousers and is determined to seek revenge for all of the teasing his old name inspired. Armed with his laser-shooting Freezy-Beam 4000, Tippy Tinkletrousers is ready to zap anyone who stands in his way.