Boris Karloff
Dr. John Garth
Evelyn Keyes
Martha Garth
Bruce Bennett
Dr. Paul Ames
Don Beddoe
Capt. McGraw
Edward Van Sloan
Dr. Ralph Howard
Ben Taggart
Warden Thompson
Pedro de Cordoba
Victor Sondini
Wright Kramer
George Wharton
Bertram Marburgh
Stephen Barclay
Robert Fiske
District Attorney
Frank Richards
Otto Kron - Convict
Kenneth MacDonald
Anson, Prison Guard
Ernie Adams
Sam - Hospital Prison Orderly
Frederick Burton
Governor Prentiss
