Robert Stevenson Director Peter Ustinov Hnup Wan Actor Helen Hayes Hettie Actor Clive Revill Quon Actor Derek Nimmo Lord Southmere Actor Joan Sims Emily Actor Bernard Bresslaw Fan Choy Actor Natasha Pyne Susan Actor Roy Kinnear Superintendent Grubbs Actor Joss Ackland B.J. Spence Actor Deryck Guyler Harris Actor Andrew Dove Lord Castleberry Actor Max Harris Truscott Actor Bill Walsh Screenwriter, Producer Paul Beeson Cinematographer Peter Boita Film Editing Ron Goodwin Original Music Michael Stringer Art Director Anthony Mendleson Costume Design Maude Spector Casting