Underdog: When Polly's in trouble/I am not slow,/it's Hip, Hip, Hip/and away I go!
Underdog: There's no need to fear! Underdog is here!
Sweet Polly Purebred: [singing to the tune of "Oh Where Has My Little Dog Gone"] Oh Where, Oh Where has my Underdog gone, Oh where, oh where can he be?
1st Man: [at end of each show] Look, up in the sky! It's a plane!
2nd Man: It's a bird!
Woman: It's a frog!
1st Man: A frog?
Underdog: Not plane nor bird nor even frog. It's just little old me...
[sound of crash off camera]
Underdog: Heh-heh, Underdog.
Underdog: [whenever something goes wrong] I am a hero who never fails, I can't be bothered with such details.
Underdog: The secret compartment of my ring I fill, with an Underdog super energy pill.
Tennessee Tuxedo: Tennessee Tuxedo will not fail!
Savoir Faire: Savoir Faire is everywhere!
Klondike Kat: Klondike Kat always gets his mouse!
Announcer: [At the end of each show] Looks like this is the end. But don't miss our next Underdog Show.
Klondike Kat: [Referring to Savior Faire] I'll boil him in oil! I'll shoot 'im at sunrise! Ooooh! I'll make *mincemeat* outta that *mouse*!
[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.
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... ]