Boris Karloff
David Mallory
Acting
Warren Hull
Jim Travers
Acting
Jean Rogers
Joan Mallory
Acting
Alan Baxter
John Baron aka The Kid
Acting
Hobart Cavanaugh
Petty Louie
Acting
Samuel S. Hinds
Steven Ranger
Acting
David Oliver
Mike Callahan
Acting
Ward Bond
Fingers
Acting
Frank Reicher
Carl - gang engineer
Acting
Edwin Maxwell
Lawyer Kruger
Acting
George Cleveland
Sam Adams - Company Engineer (uncredited)
Acting
Ruth Fallows
Waitress (uncredited)
Acting
George Humbert
Mr. Spinelli (uncredited)
Acting
Nina Campana
Mrs. Spinelli (uncredited)
Acting
Charles C. Wilson
Police Capt. Wallace (uncredited)
Acting
Chuck Hamilton
Policeman (uncredited)
Acting