George and Harold are back in another icky adventure! When class boffin Melvin Sneedly goes too far with his latest amazing invention the Bionic Booger Boy comes to sticky snotty bad-tempered life.
Just when George and Harold thought theyd saved the world again - oh no! Here come the Robo-Boogers! Disgusting and dangerous hi-tech robots made of gloomy SNOT.
Not so long ago George and Harold created the greatest superhero in the history of their school - and brought him to life by mistake! But that was only the start.
Captain Underpants returns to face his nemesis - the evil Capain Blunderpants - with the help of two new superheroes Great-Granny Girdle and Boxer Boy.