The cat should have been in the credits as it was pivotal in the movie. Harry! meow/purrrrrr. The Third Man is revealed. This movie is one of my favorite film noirs. It incorporates all the elements, especially the music, though not really jazz. Even though it was an English movie, can it be considered an "A"? The star power is certainly there.
This is a course on the aspects of film noir, not a film festival. I would suggest just watching the film being discussed for enjoyment first, if not viewed before. Then go back to scenes with a more critical eye.