Of all episodes, this is the most terrifying and chilling story. Because an individual's twisted mind and greed goes to the extent he does not hesitate taking the lives of two innocent step daughters. Jeremy Brett is of course excellent in sensing the danger and empthasies the horror faced by Helen Stoner the part excellently played by the young actor Rosalyn Landor. David Burke as Watson in the first season supplements well with Holmes' characterThe ending is rather
horrifying considering 80s.