Jack Palance portrays “Slade,” an odd and puzzling man who rents rooms from the Harley family. The story unfolds against the backdrop of heightened anxiety in Victorian London, fueled by the ongoing “Jack the Ripper” murders, and as events progress, both "Mrs. Harley" (Frances Bavier) and viewers alike start to believe that this solitary newcomer might be concealing something. Doubts grow even stronger when he shows …