Full Episode

Season 4 | Episode 3: The Final Problem

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    Aired 1/15/2017
  • Expires 1/14/2021 @ 11:55 PM ET
  • Preview: 0:20 | TV-14 | CC

In the final episode of this new season, long buried secrets finally catch up with the Baker Street duo. Someone has been playing a very long game indeed and Sherlock and John Watson face their greatest ever challenge. Is the game finally over?

“The Final Problem” was written by Mark Gatiss and Steven Moffat.

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