The seemingly deceased criminal mastermind whose body falls into a sewer after a confrontation with Holmes. Actually alive, he is behind a plot to organize drug dealing and the murder of rival crime lords. He also manipulated Holmes' brother Mycroft into opium addiction during their youth.
Lestrade is a skeptical police authority obstructing acceptance of Moriarty's return.
Lestrade is asked to consider that Moriarty survived, but remains unconvinced despite evidence connecting Moriarty to the drug trade.
Moriarty has a long-standing harmful influence over Mycroft.
The plot states that Moriarty forced Mycroft into opium addiction when the Holmes brothers were young.
Watson becomes part of the investigation opposing Moriarty's alleged criminal network.
Dr. Watson teams with Holmes to investigate murders of crime lords and uncover Moriarty's survival and criminal operation.
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