Diplomatic Courier is a 1952 American spy film noir directed by Henry Hathaway and starring Tyrone Power, Patricia Neal and Stephen McNally. The nightclub scene in the film features actor Arthur Blake, famous for his female impersonations, impersonating Carmen Miranda, Franklin D. Roosevelt, and Bette Davis. The plot was loosely adapted from the 1945 novel Sinister Errand by British writer Peter Cheyney.
Plot
In post-WWII Europe, Mike Kells returns to Paris from a courier mission, only to be immediately re-assigned by the State Department to fly to Salzburg and meet his Navy friend Sam Carew, who will pass a top-secret document to him on a particular train platform.
At the Salzburg railway station meeting site, Sam ignores Mike because Sam is apparently being tailed by two men. Mike boards the same train and in the dining car, sits near a woman Sam seems to know. The train makes an unscheduled stop in Werfen, Austria. As the train leaves and enters a tunnel, the train car lights malfunction. Mike is shocked to see the two men throw Carew’s body off the train. Mike whistle stops the train, and gets off to remain with Carew’s body.