Fu Manchu abducts a missionary doctor and forces him to surgically turn one of his hypnotized dacoits into a murderous doppelgänger of his arch-nemesis Inspector Nayland Smith of Scotland Yard as, part of a plan to become leader of the World's criminals
Christopher Lee
Dr. Fu Manchu
Douglas Wilmer
Nayland Smith
Horst Frank
Rudy / Ronald "Ronny" Moss
Tsai Chin
Lin Tang
Wolfgang Kieling
Dr. Lieberson
Maria Rohm
Ingrid Swenson
Howard Marion-Crawford
Dr. Petrie
Suzanne Roquette
Maria Lieberson
