The Lodger: A Story of the London Fog (1927)

A serial killer known as "The Avenger" is on the loose in London, murdering blonde women. A mysterious man arrives at the home of Mr. and Mrs. Bunting looking for a room to rent. The Buntings' daughter is a blonde model who is seeing one of the detectives assigned to the case. The detective becomes jealous of the lodger and begins to suspect that he might be the avenger.—Col Needham