The Brides of Fu Manchu

Christopher Lee reprises his role as the eponymous Chinese criminal mastermind. When the daughters of several prominent scientists go missing, Scotland Yard's intrepid detective Nayland Smith (Douglas Wilmer) tracks them down to a remote island headquarters, where he learns the shocking truth - that Fu Manchu is using the young women to force their fathers into developing a death ray for him, with which he can take over the world.