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.
| Directing | Piers Haggard | Director |
| Writing | Rudy Dochtermann | Screenplay |
| Writing | Jim Moloney | Screenplay |
| Writing | Sax Rohmer | Novel |
| Production | Zev Braun | Producer |
| Production | Leland Nolan | Producer |
| Sound | Marc Wilkinson | Music |
| Camera | Jean Tournier | Director of Photography |
| Editing | Claudine Bouché | Supervising Film Editor |
| Editing | Russell Lloyd | Supervising Film Editor |
| Art | Alexandre Trauner | Production Design |
| Costume & Make-Up | John Bloomfield | Costume Design |
