In Victorian era London, the inhabitants of a family home with rented rooms upstairs fear the new lodger is Jack the Ripper.
Merle Oberon
as Kitty Langley
Laird Cregar
as Mr. Slade
George Sanders
as Inspector John Warwick
Cedric Hardwicke
as Robert Bonting
Sara Allgood
as Ellen Bonting
Aubrey Mather
as Superintendent Sutherland
Queenie Leonard
as Daisy the Maid
Doris Lloyd
as Jennie
David Clyde
as Det. Sgt. Bates
Helena Pickard
as Annie Rowley
Ruth Clifford
as Hairdresser (uncredited)
Thora Hird
as First Murder Victim Katie (uncredited)
