Doctor Satan
Eduardo Ciannelli
Bob Wayne / Copperhead
Robert Wilcox
Gort
Joe McGuinn
Hallett
Bud Geary
Corbay
Paul Marion
Ross
Archie Twitchell
Scarlett
Lynton Brent
Corwin
Ken Terrell
Joe
Al Taylor
Henchman-Driver Spike
George Allen
Gray, Pick-up Thug
John Bagni
Panamint Pete
Frank Brownlee
Speed Martin
William Newell
Co-Pilot
James Bush
Sailor at Winch
Yakima Canutt
Nurse
Virginia Carroll
Barton
Ed Cassidy
Police Lieutenant
Davison Clark
Wells - Governor's Secretary
Tris Coffin
Station Master Burns
Frank Conklin
Officer
Fred Criswell
Gas Station Attendant
Eddie Dew
Plant Henchman
Frank Ellis
Prof. Thomas Scott
C. Montague Shaw
Al
James Fawcett
Roper
Sam Garrett
Duke - Mine Thug
Duke Green
Red - Mine Thug
Alan Gregg
Capt. Lathrop
Kenneth Harlan
Proprietor
Charles Hutchison
House Heavy
Jerry Jerome
Patrick Kelly
Steve - Pilot
Marten Lamont
Henchman Fallon
Bert LeBaron
Lois Scott
Ella Neal
Jack O'Shea
Chuck - Lead Truck Thug
Eddie Parker
P&G Warehouse Mgr.
Hal Price
Henchman-Guard
Ernest Sarracino
Jake - Biplane Pilot
Cy Schindell
Detective Brock
William Stahl
Warehouse Watchman
Ted Stanhope
Truck Henchman
Tom Steele
Police Officer Davis
Harry Strang
Watkins - Fire Escape Thug
Duke Taylor
Alice Brent
Dorothy Herbert
Detective Perry
Robert Wayne
Palmer - Thug
Wally West
Prof. Williams
Lloyd Whitlock
Bill Wilkus
Sailor at Cable
Bud Wolfe
Gov. Bronson
Charles Trowbridge
Police Chief Rand
Jack Mulhall
Col. Bevans
Edwin Stanley
Stoner
Walter McGrail
Director
William Witney
John English
Screenplay
Franklin Adreon
Norman S. Hall
Joseph F. Poland
Ronald Davidson
Sol Shor