British spy Alan Thurston (Mason) is trying to get hold of a camera to bring to the British Consulate in Algiers. It has pictures of the location of a top-secret meeting place of the Allied commanders regarding the invasion of North Africa. Tailing him is RNO (repugnant Nazi official) Dr. Muller, who knows of the camera. Thurston breaks into the Algerian residence of American civilian Susan Foster (Carla Lehmann), with Muller in hot pursuit. Thurston persuades her to help him in his quest for the camera, since he is too notorious and would be arrested on sight in Algiers. There then follows a tense and taut cat-and-mouse game with Nazi officials and our two co-heroes.
The picture is extremely well-done and the suspense doesn't let up for the entire 82 minutes (by my watch). There is a romantic interlude in The Casbah, where Thurston has sought refuge and has taken Ms. Foster, reminiscent of 'Pepe Le Moko", in which similar circumstances occur. Ms. Foster, it turns out, is from Kansas, fulfilling the prophesy of my headline. Walter Rilla plays Dr. Muller in despicable fashion, a Nazi civilian official feared by everyone in the picture except Thurston.
Despite the grim circumstances the mood of the picture ranges from deadly serious to lighthearted, especially during exchanges between Mason and Lehmann (the deadly serious passages belong to Rilla). I agree with a reviewer above that Mason was a dashing adventure hero - too bad he became typecast as humorless and overbearing. I don't understand why this movie is so lightly regarded and why it hasn't been shown on TV or in revival houses. Note to IMDb directors: Your rating is too low. It is better than a similar movie, "Five Graves To Cairo", made the previous year. You should at least use the median figure instead of the weighted one.