Paul Massie
Dr. Jekyll / Mr. Hyde
Christopher Lee
Paul Allen
David Kossoff
Dr. Littauer
Francis de Wolff
Inspector
Magda Miller
Sphinx Girl (uncredited)
Oliver Reed
Nightclub Bouncer (uncredited)
Helen Goss
Nanny (uncredited)
Arthur Lovegrove
Cabby (uncredited)
Walter Gotell
Heverton - Second Gambler (uncredited)
Percy Cartwright
Coroner (uncredited)
John Bonney
Renfrew (uncredited)
Denis Cleary
Waiter (uncredited)
Doug Robinson
Boxer (uncredited)
Fred Stone
Cabinet Minister (uncredited)
Mackenzie Ward
Business Man (uncredited)
Rodney Burke
Young Blood (uncredited)