One of the best loved British films of the forties, and a classic train thriller. In the last days of peace before WWII, songwriter/spy Rex Harrison must rescue a brilliant Czech metallurgist from the Nazis, while sparring with his attractive daughter (Margaret Lockwood), as they escape to freedom on the German rail network.
This is a sort of sequel to Alfred Hitchcock's The Lady Vanishes (1938), because it features the popular Englishmen abroad, Charters and Caldicott (Basil Radford and Naunton Wayne), who are in great form, and rather touchingly still catching trains through middle Europe with the continent about to go up in flames.
And both films are comedy thrillers written by Launder and Gilliat. The similarities between the two films emphasise that Carol Reed isn't quite the equal of Hitch, at least in this genre. But then, who is? It is still a fabulous entertainment with some classic lines and a drop dead climax on the last cable car into Switzerland.
How helpful of the Nazis to employ such a duffer as ticket collector on a crucial thoroughfare to freedom! Perhaps it's personal preference, but arguably Rex is a little too pleased with himself to be sympathetic. But the film sends that up. And it's a shock to see Paul Henreid in the Gestapo... But these are quibbles! This is the great British spy thriller of the war years.