The Sign of Four
Run Time: 103 mins
Air Date: Sat, 7 Mar 1987
Average Rating: ⭐ 7.331 (71 votes)
Granada TelevisionMary Morstan has received a pearl in the post every year since her father's disappearance. This leads Holmes and Watson to the truth about a secret pact between four convicts during the Indian Rebellion of 1857.