Room to Let is a 1950 British historical thriller film directed by Godfrey Grayson and starring Jimmy Hanley, Valentine Dyall and Constance Smith.^[1] It was adapted from the BBC radio play by Margery Allingham, broadcast in 1947.^[2][3]

After a fire at an insane asylum during the Edwardian era, a young journalist becomes convinced that one of the patients has escaped and taken lodgings at a local middle-class household. The mysterious "Doctor Fell" comes to dominate the three women in the house - mother, daughter and maid - and increasingly shuts them off from outside contact. Despite a lack of assistance from the authorities, the journalist suspects that the Doctor is in fact the notorious Jack the Ripper who is planning a fresh series of attacks.

• Jimmy Hanley as Curly Minter
• Valentine Dyall as Doctor Fell
• Christine Silver as Mrs. Musgrave
• Merle Tottenham as Alice
• Constance Smith as Molly Musgrave
• Charles Hawtrey as Mike Atkinson
• Aubrey Dexter as Harding
• Anthony La Penna as JJ
• Reginald Dyson as Sergeant Cranbourne
• Laurence Naismith as Editor
• John Clifford as Atkinson
• Stuart Saunders as Porter
• Cyril Conway as Doctor Mansfield
• Charles Houston as Tom
• Harriet Petworth as Matron
• Charles Mander as P.C. Smith
• H. Hamilton Earle as Orderly
• F.A. Williams as Butler
• Archie Callum as Night Watchman

TV Guide gave the film two out of five stars, calling it "A fairly disturbing programmer which remains suspenseful to the end."^[4] and Fantastic Movie Musings and Ramblings wrote, "This is basically a variation of THE LODGER, and a very effective one. Valentine Dyall steals the movie as the truly creepy lodger, Dr. Fell."^[5]