Iâm always a fan of things that demonstrate why planning is so important in fiction. Many people hate to do it, but this is why itâs important! We knew they hadnât planned anything after the pool when they wrote S1, and you can tell they hadnât planned S3, which required John to be secretive about what the H. in John H. Watson stood for, when they had John casually offer up Hamish as a baby name in S2. Outlining for the win.
As for Mary: I agree that they seemed to have a sense of what they wanted from her, but got tangled up in how to get there, and seem to keep trying to justify something that I donât think needs more justification (personally).
I think the story works much better if Mary fully intended to kill Sherlock when she shot him in S3, given what we now know about her, the way she sometimes just reacts and does the wrong thing, even though she wants to be a person who does the right thing. Her judgment is TERRIBLE, and I think thatâs sort of the point. Or, it makes sense to me if that were the point!
It would make sense to me that Sherlock took that fateful step in S3 and ceased to be a friend in that moment. He became Generic Threat That Must Be Eliminated. The moment she felt he threatened her, their fun friendship ceased to be a factor and her instincts took over. She meant him to die, and he did die, because sheâs efficient and deadly. She remains a cocked gun even when she doesnât want to be one anymore.
Iâm sorry that everyoneâs still so invested in her being a villain. I liked the rug pull of her not being a villain in the story, personally. I thought she was going to be a big bad after S3 too, but when she turned out to just have terrible instincts that ruined her relationships (like shooting Sherlock and then threatening him, and vanishing on John at exactly the wrong time), I kind of liked what that made her. A bad guy who aims for goodness and fails over and over again.
I liked that they put me in Johnâs shoes: distrusting, kind of angry with her, frustrated with the situation, stuck pretending everythingâs okay, but uncertain if this is really going to work (or should work!). I think it makes John that much more understandable and sympathetic in his own failings and anger towards Mary in the end.
But I donât think we need to go back and redeem Mary in S3. I donât know why theyâre retreating to that. Itâs way more interesting if Sherlock forgives her for actually killing him. Thatâs an insane thing to forgive, but thatâs Sherlock for you.