Mysterious Doctor Satan
Doctor Satan
Bob Wayne / Copperhead
Speed Martin
Prof. Thomas Scott
Lois Scott
Alice Brent
Gov. Bronson
Police Chief Rand
Col. Bevans
Stoner
Gort
Hallett
Corbay
Ross
Scarlett
Corwin
Joe
Henchman-Driver Spike (uncredited)
Gray, Pick-up Thug
Panamint Pete
Co-Pilot
Sailor at Winch
Nurse
Barton
