An edited version of the 4½ hour serial about a mad scientist who attempts to rule the world by creating various elaborate inventions.
Bela Lugosi
as Dr. Alex Zorka
Dorothy Arnold
as Jean Drew
Robert Kent
as Capt. Bob West
Edwin Stanley
as Dr. Fred Mallory
Regis Toomey
as Lt. Jim Daley
Jack C. Smith
as Monk
Edward Van Sloan
as Jarvis
Dora Clement
as Ann Zorka
Anthony Averill
as Rankin
Hugh Huntley
as Perkins
Monte Vandergrift
as Jarvis Goon
Frank Mayo
as West's Boss
