A mysterious criminal known as The Whispering Shadow commits crimes by means of a gang he controls by television and radio rays. Jack Norton, whose brother was murdered by The Whispering Shadow, suspects that the eerie Professor Strang - whose ghostly wax museum contains figures far too lifelike - may be involved in the crimes.
Bela Lugosi
as Professor Adam Anton Strang
Malcolm McGregor
as Jack Foster
Viva Tattersall
as Vera Strang
Robert Warwick
as Robert Raymond
Roy D'Arcy
as Steinbeck
Karl Dane
as Sparks
Henry B. Walthall
as J. D. Bradley
Lafe McKee
as Prince Alexander, alias Mr. Jerome
