London, 1888: on the night of the third Jack the Ripper killing, soft-spoken Mr. Slade, a research pathologist, takes lodgings with the Harleys, including a gloomy attic room for "experiments." Mrs. Harley finds Slade odd and increasingly suspects the worst; her niece Lily (star of a decidedly Parisian stage revue) finds him interesting and increasingly attractive. Is Lily in danger, or are her mother's suspicions merely a red herring?
Jack Palance
Slade
Constance Smith
Lily Bonner
Byron Palmer
Insp. Paul Warwick
Frances Bavier
Helen Harley
Rhys Williams
William Harley
Sean McClory
Constable #1
Leslie Bradley
Constable #2
Tita Phillips
Daisy (the maid)
Lester Matthews
Chief Insp. Melville
Harry Cording
Detective Sgt. Bates