Underdog is an American animated television series that debuted on October 3, 1964, on the NBC network and continued in syndication until 1973 for a run of approximately 124 episodes. Underdog, Shoeshine Boy’s heroic alter-ego, appeared whenever love interest Sweet Polly Purebred was being victimized by such villains as Simon Bar Sinister or Riff Raff. Underdog always speaks in rhymes, such as, “There’s no need to fear: Underdog is here!” His voice was supplied by the frequent guest on Hollywood Squares, Wally Cox (probably best remembered as Mr. Peepers).