Bogart made a lot of films; some of them mediocre, and some of them classics. This one is a classic, and it's not even because of Bogart. What makes this film a classic is its unique content (for the time), and it device of using flashback sequences the way flashback should be done (like Lawrence of Arabia and other great flashback films). The production values are excellent, and there are several chilling scenes, which I will not spoil for you. It is absolutely not your run of the mill crime drama. The character developments of a few of the heavies in the piece is rarely found in most crime films. Most of the time we get nothing but the life of the hero and how he overcomes adversity. This film does not fall into that hackneyed trap. We do learn that motive is the most important element of crime, however. Not to be missed.