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.
Derek Nimmo
as Lord Southmere
Hugh Burden
as Haines
Bernard Bresslaw
as Fan Choy
Helen Hayes
as Hettie
Joan Sims
as Emily
Deryck Guyler
as Harris
Clive Revill
as Quon
Molly Weir
as Scots Nanny
Max Wall
as Juggler
Natasha Pyne
as Susan
Joss Ackland
as B.J. Spence
Peter Ustinov
as Prince John/ Hnup Wan ''Hunp''
