When George and Harold use their traveling purple potty to travel to another dimension where the school is nice and the principal, Mr. Krupp, thinks they're funny, they meet up with their evil twins and must face their cleverest enemies ever -- themselves.

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.

When a new bunch of baddies bust up the town, Dog Man is called into action -- and this time he isn't alone. With a cute kitten and a remarkable robot by his side, our heroes must save the day by joining forces with an unlikely ally: Petey, the World's Most Evil Cat. But can the villainous Petey avoid vengeance and venture into virtue?

George, Harold, Captain Underpants, and Sulu the bionic hamster battle the three ridiculous Robo-Boogers in an attempt to turn the Bionic Booger Boy back into Melvin Sneedly.

A cute kitten disrupts Petey's plans. He was the best of dogs... He was the worst of dogs... It was the age of invention... It was the season of surprise... It was the eve of supa sadness... It was the dawn of hope... Dog Man hasn't always been a paws-itive addition to the police force. While he can muzzle miscreants, he tends to leave a slick of slobber in his wake! This time, Petey the Cat's dragged in a tiny bit of trouble -- a double in the form...

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

"The comic club is going in all different directions! Naomi, Melvin, and siblings are each trying to find their purpose. Naomi has an idea to get rich quick that causes a lot of commotion and emotion. And when faced with rejections, the friends try and try again to stay true to their vision. To top it off, a surprise visitor comes to class to stir things up. Will a desire for money and power cloud Naomi's purpose? Is it quitting time? Will the club...

Piggy is back, and his newest plot is his most diabolical yet. Dog Man and the rest of your favorite characters must join together. What new villains are on the horizon? Where are they all coming from? And who will step forward to save the city when scoundrels sabotage our Supa Buddies?