WOW! Mind blowing!
A couple of thoughts:
The scene in which John tells Sherlock that, yes, he did kill Mary, broke my heart! Sherlock's face... awwwww... But his face too, when John finally tells that it was Mary's own choice and that it wasn't his fault... The relief washing over his face... and the relief I felt too! It was sweet.
I thought Magnussen was already creepy, but God, Smith was... he made me feel uneasy. No Wonder Sherlock attacked him! Not saying violence is the right answer, but I think I would have lost my nerves too, there! Even without being high!
Mary's ghost was absolutely lovely! I'm glad they killed her off last week, because two's company and three's a crowd, but even if I wasn't particularly attached to her character, it upset me that she had gone without proper goodbyes, I'm not just talking about goodbyes from John, or Sherlock, I'm talking about us, the audience. Seeing her, in her best light (because she's lovely in that ep), reconciled me with her character (about a couple of things I didn't much like about her). Now I can let her go properly. And on another note, the whole idea of "hallucinations" made me "smile" (not really the accurate word...) because three years ago, I wrote a fanfic in which John had hallucinations about Sherlock (long after TRF) and sometimes couldn't tell if they were real or not, and he kept talking to him. Well...
John's confession was really touching. "The man you thought i was is the man I want to be" (or something like that). Awww... I could really relate, feel his pain, his relief after having confessed... Having lost my husband, I know what it feels like not being able to . I also know what it feels like, feeling guilty because while you're grieving, you feel like you're letting your child down because caring of yourself (eating, sleeping, getting dressed...) already feels so difficult, let alone looking after a child. You feel like a terrible parent and end up hating yourself. Anyway, I'm really glad John took all that off his heart, it would have driven him mad. But it was painful to see him cry like that. Painful, but necessary.
My Johnlock heart was a bit broken after the whole Irene Adler thing. Well, ok, it didn't help that I never liked Irene to begin with.
But it was immediately mended... That HUG! It should have felt awkward, coming from Sherlock, but on the contrary, it felt so natural... I loved it! And I love how Sherlock replies "No, you" (the discussion about being human). It says a lot.
Mycroft... We saw quite a lot again, much to my pleasure. Sherlock walking following precise paths to send a "feck off" message to him was priceless. As usual, I love how he cares about Sherlock, no matter what he says. I am not a fan of the scene with Lady Smallwood though. I know that in the end, he's not the iceman he wants everyone to believe he is, he can do sentiment too, just like his brother, but I don't know. I preferred that to be offscreen. I just can't explain.
Once again, we didn't see much of Molly in that ep. I'm not her biggest fan, but I still find this is a pity.
Mrs Hudson. Ah, she was amazing in that one! She, getting out of that car, really took me by surprise!!!
I didn't see the whole secret sister stuff coming! When she started taking off her contacts, I thought she was wearing a mask and that she actually was Moriarty, haha. Well, that's really interesting anyway...
I loved that episode, it really kept me on tenterhooks the whole time.