George Waggner
Director
George Waggner
Screenplay
Harry Essex
Story
Sid Schwartz
Story
Len Golos
Story
Harold H. MacArthur
Art Direction
Bernard B. Brown
Sound Supervisor
David Sharpe
Stunts
Hans J. Salter
Music Director
Charles Henderson
Music
Charles Previn
Orchestrator
Frank Skinner
Music
Eric Wybrow
Technical Supervisor
Jack Bernhard
Associate Producer
Hans J. Salter
Original Music Composer
Elwood Bredell
Director of Photography
Arthur Hilton
Editor
Jack Otterson
Art Direction
Russell A. Gausman
Set Decoration
Vera West
Costume Design
Jack Pierce
Makeup Artist
John P. Fulton
Special Effects
Charles Carroll
Sound
Lon Chaney Jr.
Dan McCormick
Lionel Atwill
Dr. Paul Rigas
Anne Nagel
June Lawrence
Frank Albertson
Mark Adams
Samuel S. Hinds
Dr. John Lawrence
William B. Davidson
District Attorney Ralph B. Stanley
Ben Taggart
Detective Sergeant Regan
Constance Bergen
Nurse
Ivan Miller
Doctor
Chester Gan
Chinese Boy, Wong
George Meader
Dr. Bruno
Frank O'Connor
Detective
John Dilson
Medical Examiner
Byron Foulger
Alienist #2
Jessie Arnold
Mrs. Frank Davis (uncredited)
James Blaine
Charlie, Prison Guard (uncredited)
Gary Breckner
Radio Announcer (uncredited)
Lowell Drew
Jury Foreman (uncredited)
John Ellis
Assistant District Attorney (uncredited)
Douglas Evans
Police Radio Announcer (uncredited)
Jack Gardner
Reporter (uncredited)
William Hall
Mike - Dynamo Operator (uncredited)
Russell Hicks
Warden Harris (uncredited)
Wright Kramer
Judge (uncredited)
Tom Quinn
Detective (uncredited)
Bob Reeves
Prison Guard (uncredited)
Mel Ruick
Defense Attorney (uncredited)
Francis Sayles
Frank Davis (uncredited)
Paul Scott
Prison Chaplain (uncredited)
David Sharpe
Hay Wagon Passenger (uncredited)
Victor Zimmerman
Dynamo Operator #2 (uncredited)
Corky
Corky the Dog (uncredited)
