Once a smart, innovative mystery show, Sherlock has become 30% melodrama, 30% stupid Spooks-like antics, 30% ridiculous, logic-defying twists, and 10% intelligent case-solving. I’m not sure this show is for people who like smart TV anymore ‑ I think it mainly exists for people who like posting hyperbolic reaction gifs on Twitter.
The worst thing to happen to Sherlock, beyond the writers’ insatiable need to force a twist into every plot point and line of dialogue, is Mary Watson, so this episode at least had one thing going for it. Sherlock Holmes is supposed to be an intelligent detective, solving fiendishly clever mysteries with his faithful sidekick, so having a super-secret spy as a third wheel screws the tone up a little. The death of Mary at the episode’s end brings to a close her chapter full of implausible secret agent nonsense.
Sherlock: The Six Thatchers introduced the curious case of Margaret Thatcher statues being broken across the country, something Sherlock thought was connected to Moriarty for some reason, explained away with some mumbo-jumbo about interconnectedness. It turned out they were being broken by a spy, looking for some hidden spy docs inside. Said spy was a former colleague of Mary, who wanted her dead in revenge for an operation gone wrong thanks to a mystery betrayer. Who was that evil traitor? A secretary shown at the start of the episode in a meeting between Sherlock and the UK’s head government and intelligence honchos.