Description by couchtuner for Sherlock Season 4 Episode 3 : 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?
Watch It Here : Sherlock Season 4 Episode 3 The Final Problem
