Dennis and his faithful hound Gnasher are out to make every day as much fun as possible, but their adventures often lead them into trouble. Dennis borrows his father's new hair restorer to use as ammo in his supersoaker for a typical day of pranking at the zoo, and ends up turning the whole town into one big bad-hair day - including Dad, who is mistaken for a gorilla and whisked off to Beanotown Zoo! The menaces need to find a cure for the hyperactive hair follicles, and quick. Show less