Wally Cox credited as playing...
Underdog • Man • Emperor • First Mate • Bubblehead Soldiers • Ghost • Old Timer • Police Officer • Sailor • Bank Committee Member • Bank Official • Fire Man • Jury Foreman • Men • Museum Worker • Scientists • Train Engineer
- [from the opening scene of the pilot episode, "Safe Waif", also used as the show's prologue]
- Narrator: One of the city's most humble and lovable characters was... Shoeshine Boy.
- Shoeshine Boy: [finishes shining a man's shoes] All finished, sir.
- Man: [gives Shoeshine Boy a silver coin] Thanks, Shoeshine Boy, you're humble and lovable.
- Shoeshine Boy: Bless you, sir.
- [bites coin]
- Narrator: Little did anyone know that whenever there was a call for help...
- Woman: Help! Help-Help!
- [Shoeshine Boy's ears perk up in surprise]
- Narrator: Shoeshine Boy became, in real life...
- [Shoeshine Boy runs into a telephone booth, which explodes, and he emerges as...]
- Narrator: Underdog!
- [repeated line]
- Underdog: [whenever something goes wrong] I am a hero who never fails. / I can't be bothered with such details.
- [repeated line]
- Underdog: The secret compartment of my ring I fill, with an Underdog super energy pill.