After she inadvertently gave Fearo the giant feeding spoon, the giant ape captures Polly. The army and the police are sent in to stop Fearo at all costs. Shoeshine Boy is busy elsewhere, polishing the footwear of Riff Raff. When Polly's calls for help reaches his ears, it takes a lot of cunning for Shoeshine Boy to get away from the villain and his henchman Mooch. Shoeshine Boy heads to the nearest phone booth to change into Underdog. Flying high over the city, our hero sees the army and the cops attack Fearo with a barrage of shells. Underdog stops the shelling and appeases Fearo by bringing him a large bunch of bananas from a nearby cargo ship. Seeing that having Fearo around is a too dangerous, Underdog returns him to his South Seas Isle... much to the displeasure of O. J. Squeeze.