Gainsborough Studios.

Sabotage: An undercover Scotland Yard detective infiltrates the home of a theatre operator who is suspected of sabotage. When the saboteur suspects he is being watched, he asks his nephew to deliver an explosive parcel across town. The lodger: The central character, called simply "The Lodger", is caught in the trap of other peoples' suspicions. Because this lodger, who is renting a room in the home of Mr. and Mrs. Bunting, seems mysterious, he is...