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Two years on from reports of his Reichenbach Fall demise, Sherlock resurfaces as London comes under threat of a huge terrorist attack. John, though, has mixed feelings – he's delighted by the return of his best friend, but harbours worries that the consulting detective's reappearance will have an adverse affect on his settled domestic life, in particular his romance with Mary Morstan.
First Air Date : Jul 25, 2010
Last Air date : Jan 15, 2017
Episode : 12 Episode
Season : 4 Season
Runtime: 90:14 minutes
Studio: BBC One
Country: United Kingdom, United States of America
