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