When George and Harold hypnotize their principal into thinking that he is the superhero Captain Underpants, he leads them to the lair of the nefarious Dr. Diaper, where they must defeat his evil robot henchmen.

"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 it turns out there's something rotten in the state of Ohio, and it's smellier than a pile of putrid gym socks." -- George and Harold, and their doubles, Yesterday George and Yesterday Harold, have a good thing going. Two of...

Dog Man is still learning a few tricks of the trade. Petey the cat is out of the bag, and his criminal curiosity is taking the city by storm. Something fishy is going on! Can Dog Man unleash justice on this ruffian in time to save the city, or will Petey get away with the purr-fect crime? Hombre Perro, el nuevo héroe de Dav Pilkey, el creador del Capitán Calzoncillos, está aún aprendiendo su oficio mientras que Pedrito el gato está acabando...