The Two Faces Of Dr Jekyll (1960)

A meek scientist becomes obsessed with his work, unaware he is driving his neglected wife into the arms of a conniving friend. The doctor develops a potion that unleashes his debauched alter ego, who throws himself into the debauched underworld of Victorian London before seeking violent revenge on those who have wronged them both. Hammer Horror, starring Paul Massie, Dawn Addams and Christopher Lee.