I've seen this several times on TV. It's a fictionalized drama telling the story of Jack the Ripper, the uncaught mysterious serial murderer of London's Whitechaple district of the late 1880's. Director John Brahm directs Merle Oberon and George Sanders and Laird Gregar as the mysterious lodger. Brahm brings great atmosphere into this adaptation of the Marie Belloc Lowndes novel thanks to the cinematography of Lucien Ballard. Great art direction and set direction in this murder mystery/suspense thriller. Brahm would go on to have a successful television directorial career in the USA in the 50's and 60's and did many episodes for the Twilight Zone. Afred Hitchcock Presents, Boris Karloff's Thriller and the Outer Limits among other shows and his many movies. This is a good tale on the Jack the Ripper story and gets a little bogged down at times and Cregar is creepy as The Lodger. I would give this a 7.5 out of 10.
Review of The Lodger
