The Wizard [Blane Whitney]; Roy the Super-Boy [Roy Carter] (introduction, origin); John Howard (introduction, death); James Reagan; Mayor Beadle (villain, introduction); Boss Schultz (villain, introduction, death)
The Firefly [Harley Hudson] (chemist. biologist, introduction, origin); Joan Burton (Harley's girlfriend, introduction); Dr. Dread [aka The Professor] (villain, introduction); Selig (villain, introduction); monsters (villains, introduction for all)
An accomplished scientist, Harley Hudson discovers the secret of the tremendous strength of insects. Suddenly, the lights in the lab go out and some fireflies flicker in, lighting up the darkness. And Harley knows that he must adopt that guise of a firefly in order to light up the darkness that shrouds the underworld.