
Dr. John Garth conducting an innovative medical experiment aimed at prolonging life and combating aging. The experiment takes an unexpected turn, placing the doctor in a confrontation with the ethics of his work and the consequences of his research.
Cast

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

Edward Earle
Dr. Nichols

Richard Fiske
Mandish

George McKay
Reardon

John Tyrrell
Sanders

Jack Cheatham
Patrolman Olson

Charles Trowbridge
Judge Braden
Bert Moorhouse
Cousel at Defense Table
Sam Harris
Courtroom Spectator
Edmund Mortimer
Courtroom Spectator

Stanley Brown
Prison Gate Guard

Eddie Laughton
Guard
James T. Mack
Butler
Gohr Van Vleck
Police Dispatcher
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