One of Our Dinosaurs Is Missing Escaping from China with a microfilm of the formula for the mysterious "Lotus X", Lord Southmere, a Queen's Messenger, is chased by a group of Chinese spies. Details Casts Title One of Our Dinosaurs Is Missing Release Date 1975-07-09 Runtime 01 Hours 34 Minutes Genres Action Adventure Comedy Drama Family Mystery Thriller Production Companies Walt Disney Productions Production Countries United Kingdom, United States of America Derek Nimmo Lord Southmere Hugh Burden Haines Bernard Bresslaw Fan Choy Helen Hayes Hettie Joan Sims Emily Deryck Guyler Harris Clive Revill Quon Molly Weir Scots Nanny Max Wall Juggler Natasha Pyne Susan Joss Ackland B.J. Spence Peter Ustinov Prince John/ Hnup Wan ''? Jon Pertwee Colonel Joan Hickson Mrs Gibbons Amanda Barrie Mrs BJ Spence Percy Herbert Mr Gibbons Arthur Howard Thumley John Laurie Jock Max Harris Truscott Andrew Dove Lord Castleberry Frank Williams Dr. Freemo Aimée Delamain Millicent Roy Kinnear Superintendent Grubbs Leonard Trolley Inspecter Eppers Joe Ritchie Cabbie Angus Lennie Hamish Kathleen Byron Colonel's Wife Lucy Griffiths Amelia John Bardon Bookmaker Jane Lapotaire Miss Prescott Richard Pearson Sir Geoffrey Michael Elwyn Haycock Anthony Sharp Home Secretary Wensley Pithey Bromley Peter Madden Sanders Erik Chitty Museum Guard