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.

• Hammer Film Productions
• Paul Massie
• Dawn Addams
• Christopher Lee
• David Kossoff
• Norma Marla
• Francis de Wolff
• Joy Webster
• Magda Miller