The Maltese Falcon (1941)
As Joe and I were watching the first episode of the new AMC series Monsieur Spade, we realized that we should re-watch The Maltese Falcon before watching the second episode. Joe remembered a lot more of the details (like who Brigid O'Shaughnessy was) than I did, but then he'd also read the book by Dashiell Hammett. And we'd watched the movie many decades ago, in 6/77 and 2/82, according to our movie book notes. We rented and watched the movie again last night.
The movie had a wonderful cast (including Humphrey Bogart, Mary Astor, Sydney Greenstreet and Peter Lorre) and excellent writing and cinematography. As Joe said, they don't make them like that any more.