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.
| Writing | David Forrest | Author |
| Writing | Bill Walsh | Writer |
| Directing | Robert Stevenson | Director |
| Camera | Paul Beeson | Director of Photography |
| Art | Michael Stringer | Art Direction |
| Art | George Richardson | Assistant Art Director |
| Editing | Peter Boita | Editor |
| Sound | Peter Best | Sound Editor |
| Costume & Make-Up | Anthony Mendleson | Costume Designer |
| Art | Hugh Scaife | Set Dresser |
| Directing | Anthony Squire | Second Unit Director |
| Camera | H. A. R. Thomson | Second Unit Director of Photography |
| Crew | Cliff Culley | Special Effects Technician |
| Crew | John Stears | Special Effects |
| Production | Eric Rattray | Production Manager |
| Directing | Terry Clegg | Assistant Director |
| Directing | Dickie Bamber | Assistant Director |
| Directing | Tilly Day | Continuity |
| Directing | Georgiana Hamilton | Continuity |
| Camera | Godfrey A. Godar | Camera Operator |
| Camera | Walter Byatt | Camera Operator |
| Production | John Southwood | Location Manager |
| Costume & Make-Up | Freddie Williamson | Makeup Artist |
| Costume & Make-Up | Betty Glasow | Hairdresser |
| Production | Maude Spector | Casting |
| Art | Gus Walker | Construction Manager |
| Sound | Danny Daniel | Sound Recordist |
| Sound | Ken Barker | Sound Recordist |
| Sound | Ron Goodwin | Music |
| Production | Hugh Attwooll | Associate Producer |
| Production | Bill Walsh | Producer |
