Episode 1 - Six Statues of Margaret Thatcher - Chinese student and his wife Mary are preparing to face the biggest challenge in life - becoming parents for the first time. However, this does not bring a happy ending. Mary replaces SherlockBlocked a shot and died.

In the second episode - The Lying Detective - the new villain Culverton Smith appeared. Culverton Smith smiled eerily and said: “The best way to destroy your good friends is to tell them your most importantDark secrets.”

And Cullverton Smith is even worse than Magnussen and Moriarty.

In the third episode - the final puzzle - in order to save his friend, Sherlock's rewritten memory was painfully evoked, and he found and saved his sister.

《Sherlock Season 4》(Sherlock Season 4) is a TV series produced by the British Broadcasting Corporation, written by Steven Moffat and Mark Gatiss, and starring Rachel Tallari, Nick Herron, BenDirected by Cuaron, starring Benedict Cumberbatch and Martin Freeman.

The play is adapted from the detective novel "Sherlock Holmes" created by Arthur Conan Doyle. It moves the time background of the original work from the 19th century to the 21st century and tells the story of the fashionable metropolis in the bustling metropolis of London.The story of detective Sherlock Holmes and his friend John H. Watson as they take on a series of dangerous and unusual cases.