Dr. Ross Williams (John Howard) is a solemn man of science who is on the verge of creating a cure for radiation poisoning. All he needs are some willing human subjects to test his antidote. He finds his test subjects in the cells of Alcatraz, where sentenced prisoners are offered their freedom -- if they survive. When one of his test subjects is mysteriously murdered, suspicion falls on Dr. Williams, who must find the real killer to clear his name and save his experiment.
Director: Edward L. Cahn
Producer: Edward L. Cahn
Cast: John Howard, Joan Dixon, Walter Kingsford, Lynne Carter, Robert Shayne, Kim Spalding, Sam Scar, Kenneth MacDonald, Dick Cogan, Frank Cady, Byron Foulger, Ralph Peters, Lewis Martin, Harry Lauter and Raymond Largay