Piers Haggard Director Peter Sellers Dennis Nayland Smith, Dr. Fu "Fred" Manchu Actor Helen Mirren Alice Rage Actor Sid Caesar Joe Capone Actor David Tomlinson Sir Roger Avery Actor Simon Williams Robert Townsend Actor Steve Franken Peter Williams Actor Stratford Johns Ismail Actor John Le Mesurier Perkins Actor John Sharp Sir Nules Thudd Actor Clément Harari Doctor Arnold Wretch Actor Lee Kwan-Young Tong Actor Burt Kwouk Fu Manchu's Servant Actor Clive Dunn Keeper of the Keys - London Tower Actor Zev Braun Producer Leland Nolan Producer Lynne Frederick Executive Producer Hugh Hefner Executive Producer Rudy Dochtermann Screenwriter Jim Moloney Screenwriter Marc Wilkinson Original Music Jean Tournier Cinematographer Russell Lloyd Film Editing Claudine Bouché Film Editing Alexandre Trauner Production Design Robert Christidès Set Decoration John Bloomfield Costume Design