Cast
Dudley Digges
Horace Merrick
Irving Pichel
Police Radio Announcer (voice) (uncredited)
Dorothy Wilson
Patricia Merrick, also known as Mlle. Mystera
Frank Reicher
Joe Valerie
Jane Darwell
Mrs. Marble
Stanley Blystone
Police Car Driver (uncredited)
Tom Brower
Detective Schultz (uncredited)
Pat O'Malley
Detective Brady (uncredited)
Stuart Erwin
Dwight Wilson
Warner Oland
Dr. Paul Cornelius
Oscar Apfel
Chief of Detectives John F. O'Hara
Ed Brady
Paddywagon Cop (uncredited)
Max Wagner
Policeman in Car (uncredited)
Gertrude Hoffmann
Mattie (as Gertrude W. Hoffman)