A very obscure US British production for sure, not widely known, but rather good to watch. I will prefer Anton Diffring here than a very predictable Dennis O'Keefe in a Alfred Hitchcock style like plot. Forgettable film, obviously but acceptable and fun to watch. Good period atmosphere, noir atmosphere but unfortunately a bit bland and flat. Burt Balaban gives here his first picture and the following ones will be far better: MURDER INC and MAD DOG COLL, two gangsters stories. So, this one is worth seeing if you can reach it and have nothing else to do, and also if you are a die hard movie collector or gem seeker. Excellent ending, far above average.