For a noir fan, "London Blackout Murders" from 1943 sounds exciting. It isn't.
A young woman (Mary McLeod) is bombed out of her house and moved into a place that apparently has an unsavory reputation. The man downstairs, Oliver Madison (Leslie Matthews) is helpful, but when news of the London Blackout Murders, which seem to take place in bomb shelters hits, Mary believes he may be the blackout murderer. The murders were committed with a hypodermic, and Mary saw that he had one.
A Scotland Yard Inspector (Lloyd Corrigan) believes Madison might be guilty too and uncovers a secret he's keeping. However, if he is indeed killing these people, why?
This film is not much on action, tension, or suspense. What it does have is that foggy British atmosphere and certainly puts forth the idea that London during WW II was a scary place. Not very impressive.