Christopher Lee as Dr. Fu Manchu

Douglas Wilmer as Nayland Smith

Horst Frank as Rudy / Ronald "Ronny" Moss

Tsai Chin as Lin Tang

Wolfgang Kieling as Dr. Lieberson

Maria Rohm as Ingrid Swenson

Howard Marion-Crawford as Dr. Petrie

Suzanne Roquette as Maria Lieberson

Noel Trevarthen as Mark Weston

Tony Ferrer as Insp. Ramos

Mona Chong as Jasmin

Peter Carsten as Kurt Heller

Eddie Byrne as Ship's Captain

Christopher Casson as