I recently watched Hitchcock's Notorious on TCM for the first time. It was definitely a winner, starring Cary Grant (Judy Judy Judy), Ingrid Bergman, and Claude Rains from 1946. Grant is a U.S. spy and recruits Bergman who is pro-U.S. but whose father is a convicted NAZI war criminal. It is her job to seduce and marry NAZI Claude Rains who is in Rio, Brazil.
I've probably seen everything Cary Grant was ever in. The vast majority of movies he was in are worth watching. His kind of subtlety in the acting profession is kind of a lost art these days.