Excluding musicals, can music be so intertwined with screenplay that without its music, a great motion picture becomes mediocre? Or a mediocre-to-good motion picture becomes a great one because of its music? Among motion pictures of this type, the three that come to my mind are: 1. Casablanca (1942) Humphrey Bogart, Ingrid Bergman. 2. The Third Man (1949) Joseph Cotten, Alida Valli, Orson Welles. 3. Tom Jones (1963) Albert Finney, Susannah York, Hugh Griffith. I'm confident there are others.