Dirty Harry is the first in the series, and I remember there are four more. There is a movie called Sudden Collision (1983), which was also directed by Eastwood. It tells the story of Harry following a woman who is bent on revenge, but he accidentally finds that he and the other party have a lot in common. The movie's famous saying is "Go ahead. Make my day. " (to the effect that: have the ability to do things. I'm afraid of you? )