Elenco (na ordem dos créditos)
George S. Irving
Narrator
Wally Cox
Underdog
Allen Swift
Simon Bar-Sinister
Norma MacMillan
Sweet Polly Purebred
Ben Stone
Cad
Delo States
Little Girl
Donny Texanidi
Kenny Delmar
Muldoon
Sandy Becker
ATOR
Mort Marshall
Don Adams
Tennessee Tuxedo
Larry Storch
Phineas J. Whoopie
Bradley Bolke
Chumley