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