The Final Problem Trailer - Sherlock Series 4 Ep 3 - Sherlock

In the final episode of this series, written by Mark Gatiss and Steven Moffat, long-buried secrets finally catch up with the Baker Street duo. Someone has been playing a very long game indeed and, alone and defenceless, Sherlock and Dr Watson face their greatest ever challenge. Is the game finally over?

• 2017-01-09T21:31:08+00:00
• Duration: 00:20

• TheFinalProblem
• SherlockSeason4
• SherlockBBC
• Sherlock
• season4
• BenedictCumberbatch
• MartinFreeman
• BBC

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