Sherlock stars Benedict Cumberbatch as Sherlock Holmes and Martin Freeman as Doctor John Watson. The season 4 finale can be seen on PBS Sunday, January 15 at 7:00PM.
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?