The adventures of a rhyming canine superhero.
Genre: Animation, Action, Adventure
Cast:George S. Irving , Wally Cox , Allen Swift , Norma MacMillan , Ben Stone , Delo States , Donny Texanidi , Kenny Delmar , Sandy Becker , Mort Marshall , Don Adams , Larry Storch , Bradley Bolke
Underdog rescues a boy locked in a bank vault, causing destructive mayhem in the process.
An army of huge mechanical monsters invades the city and capture Polly Purebred.
Simon Bar-Sinister develops an energy ray that turns its target into a photograph. He kidnaps Sweet Polly Purebred to trap Underdog into a photograph and tear him up.
Underdog's doppelganger Tap Tap escapes from prison by impersonating Underdog. He threatens to blow up Sweet Polly Purebred if Underdog doesn't obey Tap Tap's commands.
Simon invents a snow machine. He turns people into snow. Can Underdog stop him before it's to late?
Simon Bar-Sinister engages in a robbery spree throughout the city, turning people into snowmen. Meanwhile, Sweet Polly Purebred discovers Simon's laboratory.
Simon forces Sweet Polly Purebred to broadcast an ultimatum to the city. When Underdog comes to save the day, Simon uses his snow ray on him.
Underdog has been frozen by Simon's snow ray, and Simon holds the city in terror.
King Klobber, from the distant planet of Zot, has promised his daughter, Princess Glissando, the strongest husband in the universe.
King Klobber sends a delegation to earth to bring back Underdog to marry his daughter, against Underdog's wishes.
Underdog successfully fights off the Zot army, so King Klobber kidnaps Sweet Polly Purebred.
To save Sweet Polly, Underdog agrees to marry Princess Glissando. The wedding is threatened by a two-headed dragon.
O.J.Skweez, desperate for ratings, sends Sweet Polly Purebred to catch a tremendous ape, Fearo The Ferocious on camera. Shoeshine Boy accompanies Polly on the Friday The 13th.
After Polly's plane gets caught in a freak storm, she calls for Underdog. He comes after it crash-lands in a strange uncharted land of the Pickyoon. Magically shielded from the rest of the world by a despotic witch that rules it. The Witch becomes aware of Underdog's great powers, which rival hers. Devising a plan in which to exploit that power, she captures Polly and places her under a spell. Ransoming Polly in order to force Underdog to perform Herculean labors. The last labor causes Underdog to forsake Polly and he battles with the witch. To the Death!