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第 4 季，第 5 集: A young man is found murdered on a railway line leading from the underground. Plans of a secret submarine are found in his pocket. Is he a hero or traitor? Aided and abetted by brother Mycroft, Holmes and Watson search for the killer of Cadogen West and look to secure the missing papers.
Mystery · 1986年7月9日 · 50 分鐘