The truncated feature version of the 4½ hour serial about a mad scientist who attempts to rule the world by creating various elaborate inventions.
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
