The Invisible Man - 1933 - Claude Rains, Gloria Stuart - Watched this with my Dad when I was about 10 and have loved it ever since. Bonus fun: Gloria Stuart as a lovely young leading lady, decades prior to being a sassy old woman in Titanic.
Notorious - Directed by Alfred Hitchcock - Written by Ben Hecht - With Cary Grant & Ingrid Bergman. A woman is asked to spy on a group of Nazi friends in South America. How far will she have to go to ingratiate herself with them?