So Sherlock has been tortured. That’s sort of obvious, since we see it happening in this scene.
But there are older wounds along with the new ones, likely provided by our friend here with the cheating wife.
And Sherlock is holding up pretty well for someone being tortured, so it’s likely been through this before.
Sherlock in this episode is different. More extreme with his emotions, both ways. And that’s concerning, especially when a self declared high functioning sociopath (*cough* bullshit *cough*) is involved.
And how about those auditory hallucinations? They could be one of (likely) two things
- PTSD. Auditory hallucinations can occur in people with severe or chronic PTSD, which Sherlock could have, considering two years.
- Drugs. Auditory hallucinations can also occur as a result of intoxication or withdrawal from a number of drugs, including cocaine and amphetamines.
Neither of which is very nice, but the PTSD is looking more likely, considering what we’ve seen in this episode of the torture.
So Sherlock is obviously not the same. He can’t expect John to be the same, and I think he’s realized that after the events of the first episode. But John must also realize that Sherlock isn’t the same. And he’s likely not going to talk about it (especially considering they’re both awful at ‘that sort of thing’) so John may not think to ask.
Bottom line, Sherlock is damaged and hurting, physically, mentally, emotionally, psychologically, and John needs to understand that too and support him through that, like Sherlock once did for him.