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
Joe McGuinn
Gort
Bud Geary
Hallett
Paul Marion
Corbay
Archie Twitchell
Ross
