The Whispering Shadow (1933) is a Serial film, starring Béla Lugosi in his first of five serial roles. Lugosi received $10,000, the highest known salary of his career, for this film. (He also received the same amount for The Mystery of the Marie Celeste aka The Phantom Ship in 1935). The serial was filmed in only 12 days. It was the last film for actor Karl Dane.
The plot for The Whispering Shadow is as follows:
The Shadow in The Whispering Shadow is the underworld mastermind. He has invented a device that allows him to kill by radio control. He, along with several other persons, seeks the Czar's jewels. The series is notable for the constant false clues and decoy actions that make nearly everybody a suspect. Despite being the voice of The Shadow, Lugosi is a red herring.
The cinematography mimicked that of Karl Freund in Universal's Dracula - for example, using close ups of the actors' eyes - in order to take advantage of Bela Lugosi's fame as the star of that film. The shadow of The Shadow is not real; It was drawn in later by animators. The serial was later edited down to a feature length edition (as was common in those days). (Source: wikipedia.org)