Ford Beebe (Director) · Saul A. Goodkind (Director) · George H. Plympton (Screenplay) · Basil Dickey (Screenplay) · Mildred Barish (Screenplay)
Bela Lugosi
Dr. Alex Zorka
Dorothy Arnold
Jean Drew
Robert Kent
Capt. Bob West
Edwin Stanley
Dr. Fred Mallory
Regis Toomey
Lt. Jim Daley
Jack C. Smith
Monk
Edward Van Sloan
Jarvis
Dora Clement
Ann Zorka
Anthony Averill
Rankin
Hugh Huntley
Perkins
Monte Vandergrift
Jarvis Goon
Frank Mayo
West's Boss
Jim Farley
Harbormaster
Eddie Acuff
Mac
Ed Wolff
The Robot
Roy Barcroft
Parker (uncredited)
Lee J. Cobb
Road Crew Foreman (uncredited)
Charles King
Car-Crash Cop (uncredited)
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The truncated feature version of the 4½ hour serial about a mad scientist who attempts to rule the world by creating various elaborate inventions.
