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A mysterious cipher is being scrawled on the walls around London. The first person to see the cipher is dead within hours of reading it. Sherlock plunges into a world of codes and symbols, consulting with London's best graffiti artists. He soon learns that the city is in the grip a gang of international smugglers, a secret society called the Black Lotus.
Release date: 2010-08-01
220 votes
Season number: 1
Episode number: 2
Runtime: 89 minutes
Paul Chequer - DI Dimmock, Philip Starnier - German Tourist