Fu Manchu's 168th birthday celebration is dampened when a hapless flunky spills Fu's age-regressing elixir vitae. Fu sends his lackeys to round up ingredients for a new batch of elixir, starting with the Star of Leningrad diamond, nabbed from a Soviet exhibition in Washington. The FBI sends agents Capone and Williams to England to confer with Nayland Smith, an expert on Fu.

Directed by: Peter Sellers & Piers Haggard
Written by: Jim Moloney & Rudy Dochtermann
Release date: 1980-08-08
Runtime: 108 minutes
Tagline: BEWARE! See this movie - An hour later you'll want to see it again!
Cast:
Helen Mirren Helen Mirren
Alice Rage 
Peter Sellers Peter Sellers
Fu Manchu / Nayland Smith 
Clive Dunn Clive Dunn
Keeper of the Keys - London Tower 
Stratford Johns Stratford Johns
Ismail 
Burt Kwouk Burt Kwouk
Fu Manchu's Servant 
John Le Mesurier John Le Mesurier
Perkins