In this 1941 mystery, Inspector Hornleigh and Sergeant Bingham face off against a cunning gang of Nazi espionage agents. Much of the suspense unfolds aboard a speeding train, as the protagonists struggle to discern friend from foe. Adding to the intrigue is Mrs. Wilkinson, played by Phyllis Calvert, who harbors secrets of her own. Cast: - Gordon Harker as Inspector Hornleigh - Alastair Sim as Sergeant Bingham - Phyllis Calvert as Mrs. Wilkinson - Edward Chapman as Mr. Blenkinsop - Charles Oliver as Dr. Wilkinson - Raymond Huntley as Dr. Kerbishley - Percy Walsh as Inspector Blow - David Horne as Commissioner - Peter Gawthorne as Colonel - Wally Patch as Sergeant Major - Betty Jardine as Daisy - O. B. Clarence as Professor Mackenzie - John Salew as Mr. Tomboy - Cyril Cusack as Postal Sorter - Bill Shine as Hotel Porter - Sylvia Cecil - Edward Underdown - Marie Makine - Richard Cooper Runtime: 87 minutes