Watch full movie online: Before I Hang (1940), for free
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.
Director: Nick Grinde
Writers: Robert Hardy Andrews (story and screenplay) (as Robert D. Andrews), Karl Brown (story)
Stars: Boris Karloff, Evelyn Keyes, Bruce Bennett