Time''s running out for the world''s supreme criminal mastermind: Fu Manchu has run out of the elixir that keeps his 168-year-old body Fit for Fiendishness. So he and his malevolent minions set out to purloin the ingredients, including a canary-yellow diamond that''s one of England''s crown jewels. In his final film, Peter Sellers merrily spoofs one of horror''s favorite arch villains. He''s deliciously diabolical - and doesn''t stop there: he''s up to his old multiple-role tricks that worked so hilariously in Dr. Strangelove and The Mouse That Roared, also stiff-upper-lipping it as Fu''s unflappable nemesis, Nayland Smith of Scotland Yard. Adding to this case of multiple laughs are Helen Mirren as a tap-dancing constable, Sid Caesar as an uncouth American G-man and David Tomlinson as a befuddled commissioner.