Cast
Eduardo Ciannelli
Doctor Satan
Robert Wilcox
Bob Wayne / Copperhead
William Newell
Speed Martin
C. Montague Shaw
Prof. Thomas Scott
Ella Neal
Lois Scott
Dorothy Herbert
Alice Brent
Charles Trowbridge
Gov. Bronson
Jack Mulhall
Police Chief Rand
Edwin Stanley
Col. Bevans
Walter McGrail
Stoner
Crew
John English
Director
William Witney
Director
Franklin Adreon
Screenplay
Ronald Davidson
Screenplay
Norman S. Hall
Screenplay
Joseph F. Poland
Screenplay
Sol Shor
Screenplay
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