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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 about his friend's shocking return.
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
