This film is alright. Bunch of people in a hotel, at least one of them is a spy. Police get James Mason's character to investigate and hijinks ensue. This film handles it's premise fairly well and has solid performances all round. The story moves along at a good pace and the cinematography gets the job done. There really isn't all that much to say, it's a fine film but wouldn't appeal to everyone. If you like old mystery films set around WW2 then clearly this is a film for you. If the premise doesn't leap out at you then there are definitely better films to watch. 6/10.