Fear in the Night is a film noir directed by Maxwell Shane in 1947 on a rather obviously low budget. It was based on a short story by William Irish, aka Cornell Woolrich, and was re-made a few years later as Nightmare starring Edward G. Robinson. In this version, Forrest DeKelley, later Bones in Star Trek, made his movie debut.
The set-up is pleasing. A man has a nightmare, finding himself in a weird, octagonal room with mirrors for walls. A murder takes place - and he commits it. He is thankful to wake up back in his hotel room, only to find that he still has the key to the room from his nightmare....
It may not be the most sophisticated mystery I've ever watched, but I found it rather enjoyable. There is a highly-wrought atmosphere from start to finish, as the man who believes he is guilty finds he cannot live with himself, even though he does not have a clue why he would have killed someone he didn't know. The solution is rational, and reasonably entertaining.
Woolrich was a master of the 'emotional thriller'. The only writers to equal his mastery in this field were Boileau and Narcejac. It's no coincidence that their books, like Woolrich's, were often made into films. They are highly visual, as well as dark. Woolrich, by the way, was gay, and I've read an article which suggests the film has a strong homosexual sub-text. But if that's right, it was lost on me.