Craig Stevens
— Carl Becker
Faye Emerson
— Paula Fengler
John Ridgely
— John Trent
Charles Lang
— Jim Jackson
Robert Warwick
— Dr. Woodford
Frank Reicher
— Henry Bremmer
Rex Williams
— Hans
Frank Wilcox
— Senior Agent
George Meeker
— Rudolph Dietz
Roland Drew
— Fred Blosser - Chauffeur
Addison Richards
— C.G. Travers
Cliff Clark
— Detective Capt. Jarrett
Monte Blue
— Hugo Mehl
Ray Teal
— Casey (uncredited)