This World War II espionage classic has all the right elements in just the right mix: a) menacing Nazis; b) spies; c) double dealing; d) heroic characters; e) the old guard; f) noble values, g) a cliff-hanging ending; h) and just enough threatened violence to keep your palms sweaty and glued to your seat. An added plus is the exotic setting of the movie (in Turkey). It is my understanding that the director wanted to keep the movie as realistic as possible, so he filmed in locations where the action actually took place. A tag at the beginning of the film states that it is a real story. Suave James Mason is a joy to watch paired against straight-laced Michael Rennie. Don't miss this one!