A spoof of superhero melodramas, the cartoon Underdog has a similar Clark Kent-style character, the ordinary dog Shoeshine Boy. But whenever there is trouble afoot, Shoeshine Boy ducks into a phone booth to don his uniform and become Underdog (his quick change routine usually accompanied by the phone booth's explosion). Always speaking in rhymes, the heroic Underdog must thwart evil plots from the likes of Simon Bar Sinister, Riff Raff, and Overcat.
Cast and Characters Voices
Wally Cox as Underdog
Norma MacMillan as Sweet Polly PureBred
Allen Swift as Simon Bar Sinister
Recurring characters
Underdog
Sweet Polly PureBred
Simon Bar Sinister
Riff Raff
Overcat
Broadcast History First Telecast:October 3, 1964 Last Telecast: September 2, 1967 Number of Episodes: 124
Number of Seasons: 6
Original Network: NBC, CBS, Syndication
Theme Song and Opening Credits
Theme by W. Watts Biggers
When criminals in this world appear,
And break the laws that they should fear,
And frighten all who see or hear,
The cry goes up both far and near for
Underdog! Underdog! Underdog! Underdog!
Speed of lightning! Roar of thunder!
Fighting all who rob or plunder!
Underdog! Underdog!
Cartoons 
A spoof of superhero melodramas, the cartoon Underdog has a similar Clark Kent-style character, the ordinary dog Shoeshine Boy. But whenever there is trouble afoot, Shoeshine Boy ducks into a phone booth to don his uniform and become Underdog (his quick change routine usually accompanied by the phone booth's explosion). Always speaking in rhymes, the heroic Underdog must thwart evil plots from the likes of Simon Bar Sinister, Riff Raff, and Overcat.
