S4 E3: The Final Problem

Aired: 1/14/2017 | 1:29:54 | Expires: 1/14/2021 | Episode
In this episode, written by Mark Gatiss and Steven Moffat, long-buried secrets catch up with the Baker Street duo. Someone has been playing a long game indeed and Sherlock and Watson face their greatest ever challenge. Is the game finally over?

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