The Upturned Glass [1947] [DVD]

James Mason plays a neurologist who is well-known for his great lectures. In a hall packed with students, he tells the story of a patient who murdered but was NOT mentally imbalanced. While he changes the names of the characters, the film audience can see that the story is about Mason himself--he will eventually kill someone. The story explains all the events leading up to it. Then you learn that he has NOT yet killed but wanted, in a crazy way, to tell others about his plan before executing it. All this is quite good. However, when he then executes the plan, it's amazingly sloppy and he makes many mistakes. I didn't like this but at least the film in the end redeemed itself with a dandy ending. In many ways, this is almost like a British version of noir. Interesting and worth seeing.