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)
William Hall
Mike - Dynamo Operator (uncredited)
Russell Hicks
Warden Harris (uncredited)
Bob Reeves
Prison Guard (uncredited)
David Sharpe
Hay Wagon Passenger (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)
Wright Kramer
Judge (uncredited)
Tom Quinn
Detective (uncredited)
Mel Ruick
Defense Attorney (uncredited)
Francis Sayles
Frank Davis (uncredited)
Paul Scott
Prison Chaplain (uncredited)
Victor Zimmerman
Dynamo Operator #2 (uncredited)
Corky
Corky the Dog (uncredited)
