Sherlock and Watson embark on a hunt to connect a series of murders that he believes are connected to Moriarty. After finding out who the killer is, Sherlock takes him captive and interrogates him and finds out that Moriarty is behind it. While trying to partner with Moran to take down "M" Moran is blackmailed into killing himself to save his sister. Sherlock receives a phone call from Moriarty which leads us into next week.
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