After a series of scientific experiments directed towards freeing the inner man and controlling human personalities, the kindly, generous Dr Henry Jekyll succeeds in freeing his own alter ego, Edward Hyde, a sadistic, evil creature whose pleasure is murder.

Paul Massie
as Dr. Jekyll / Mr. Hyde

Dawn Addams
as Kitty Jekyll

Christopher Lee
as Paul Allen

David Kossoff
as Dr. Littauer

Norma Marla
as Maria

Francis de Wolff
as Inspector

Joy Webster
as Jenny

Magda Miller
as Sphinx Girl (uncredited)

Oliver Reed
as Nightclub Bouncer (uncredited)

Helen Goss
as Nanny (uncredited)
Wuchak
_**Dr. Jekyll and Mr. Handsome Hedonist**_ In wild London of 1874, a reclusive scientist obsessively studies human nature (Paul Massie) while his alluring wife (Dawn Addams) is having a questionable relationship with a smooth gambler (Christopher Lee). The sudden appearance of suave Edward Hyde s...
CinemaSerf
Paul Massie is really only competent here as physician "Dr. Jekyll" who is becoming increasingly frustrated by the rather linear approach taken by modern science to the issue of the human psyche. Trapped in a loveless marriage with "Kitty" (Dawn Addams) who is much keener on his parasitical friend "...