Before I Hang (1940)

A physician on death row for a mercy killing is allowed to experiment on a serum using a criminals’ blood, but secretly tests it on himself. He gets a pardon, but finds out he’s become a Jekyll-&-Hyde.

cast: Boris Karloff …. Dr. John Garth, Evelyn Keyes …. Martha Garth , Bruce Bennett …. Dr. Paul Ames, Edward Van Sloan …. Dr. Ralph Howard

1940, B&W, 60 minutes