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.
Stars
Boris Karloff
Evelyn Keyes
Bruce Bennett
Edward Van Sloan
Ben Taggart
Pedro de Cordoba
Wright Kramer
Bertram Marburgh
Nick Grinde
