THIS IS NO JOKE!

George and Harold are in big trouble. Their latest prank has made Melvin Sneedly, the school’s biggest nerd, absolutely furious, and now he can't wait to get his revenge. But in his attempt to turn himself into a bionic super boy, things go terribly wrong...

And that's how the Bionic Booger Boy is born! Will Captain Underpants manage to defeat this disgusting Booger Monster, or are we all doomed to drown in a revolting, slimy flood? Either way, you’re going to need tissues!