A very fine WWII thriller. When the Nazis goose step into Prague they covet a learned industrial scientist who'd be valuable to the German military. He goes on the lam with his daughter, Margaret Lockwood, and they're helped by undercover British agent, Rex Harrison, posing as a monacled Gestapo officer. At turns tense and funny, this could almost be a sequel to Hitchcock's famous "The Lady Vanishes": same screenwriters, leading lady, espionage twists and derring-do aboard a moving train. Hang on for the exciting finale, a chase on cable cars 60,000 feet over the Swiss Alps.