Eduardo Ciannelli
Doctor Satan
Robert Wilcox
Bob Wayne / Copperhead
William Newell
Speed Martin
C. Montague Shaw
Prof. Thomas Scott
Dorothy Herbert
Alice Brent
Charles Trowbridge
Gov. Bronson
Jack Mulhall
Police Chief Rand
George Allen
Henchman-Driver Spike
John Bagni
Gray, Pick-up Thug
Frank Brownlee
Panamint Pete
Yakima Canutt
Sailor at Winch
Davison Clark
Police Lieutenant
Tris Coffin
Wells - Governor's Secretary
Frank Conklin
Station Master Burns
Eddie Dew
Gas Station Attendant
Frank Ellis
Plant Henchman
Duke Green
Duke - Mine Thug
Alan Gregg
Red - Mine Thug
Kenneth Harlan
Capt. Lathrop
Charles Hutchison
Proprietor
Patrick Kelly
Plant Henchman
Marten Lamont
Steve - Pilot
Bert LeBaron
Henchman Fallon
Eddie Parker
Chuck - Lead Truck Thug
Hal Price
P&G Warehouse Mgr.
Ernest Sarracino
Henchman-Guard
Cy Schindell
Jake - Biplane Pilot
William Stahl
Detective Brock
Ted Stanhope
Warehouse Watchman
Harry Strang
Police Officer Davis
Duke Taylor
Watkins - Fire Escape Thug
Robert Wayne
Detective Perry
Lloyd Whitlock
Prof. Williams
Bill Wilkus
Truck Henchman
