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.
Cast: Derek Nimmo, Hugh Burden, Bernard Bresslaw, Helen Hayes, Joan Sims, Deryck Guyler, Clive Revill, Molly Weir, Max Wall, Natasha Pyne
