Underdog breaks out of the phone booth, and hears the cries for help again. Underdog flies to the lady, who tells him that her little boy has been accidentally locked in a bank vault. With only this information, Underdog flies off toward the bank. He reaches a bank, crashes in, much to the shock of the occupants, and then proceeds to rip open the giant door to the vault. The bank president blows up at Underdog, saying that he's got the wrong bank! So, Underdog flies to the correct bank, and attempts to rescue the boy. But at first, nothing he tries works. He crashes through the vault door, only to crash through the whole building and the one next door as well. He tries using his X-ray vision to locate the boy, but instead, starts a fire! All the people in the bank are in a panic now! Underdog uses his atomic breath to blow out the fire, and in the process, blows virtually the whole building away! But at least the mother's little boy is found all safe and sound.

An army of giant robots take over the city and capture Polly. Underdog foils the monsters by using his high-pitched voice to destroy the robots' electronic brains. The robots aren't the only thing destroyed, but so is all of the city's glassware.

Sweet Polly Purebread boards a ship to travel to a south sea island to investigate the world's biggest monster "Fearo the Ferocious". Go-Go Gophers: Colonel Coyote thinks a book entitled "How to Fight Indians and Win" will help him succeed in capturing Running Board and Ruffled Feathers. Commander McBragg - Dodge City Dodge: The commander tells of the time he cleaned up Dodge City of it's outlaws with the help of a water tower.

After overcoming a mutiny at sea Polly and the gang continue on to the south sea Island to find "Fearo the Ferocious". Upon arriving at the Island Underdog saves the day as he overcomes ferocious dinosaurs.

Reminiscent of the movie King Kong the gang captures "Fearo" and return him to civilization to meet the public in a big television broadcast. But "Fearo" escapes in a rampage, kidnapping Polly in the process. Go Go Gophers - Who's a Dummy?: The colonel tries a tactic from the football playbook and he and the sergeant fail miserably. Commander McBragg - Football By Hex: The commander tells of the time he single-handedly won a football game at his old university.

"Fearo" runs amok and even the Army cannot stop him. Underdog arrives on the scene and battles "Fearo" by tantalizing him with a jungle delicacy.

Simon Bar Sinister is working an a chemical that will shrink the city's citizens to miniature size. Go-Go Gophers - Tapping the Telegraph: General Nuisance returns with a transmission station and 400 troops. His plan is to keep in contact with the fort and coordinate attacks on Running Board and Ruffled Feathers. However, the Indians get a transmitter of their own and block those messages and send their own. Commander McBragg - Rabelasia: The commander relates his story of the time he outwitted the Secret Service and made off with some plans while working as a spy.

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Simon, a mad scientist, creates a camera. This is not some ordinary camera however. When he takes someone's picture, the freezes them in the photograph!