It's revealed in this episode that Underdog can use his powers while he's Shoe Shine Boy, and he does do this for the first time in this episode. He usually doesn't do this though as if anyone saw Shoe Shine Boy using Underdog's powers, it would reveal Underdog's secret identity.
Simon Bar Sinister appears but has no speaking role.
First episode with Simon Barsinister.
Introduces Sweet Polly Purebred, ace TV reporter.
This is the only episode without Sweet Polly.