I was a bit uncomfortable with the fan-club-for-laughs thing too, and Sherlock being surprised that the train-spotter had a girlfriend - why would that (and society's expectations of geeks) even matter to Sherlock?

I enjoyed it though; comments on my post. I don't think we know how Sherlock survived yet either, but it must have been something with fewer complexities to go wrong.

That's interesting about Mary deducing patients' complaints. Normally a practice nurse wouldn't know here unless they were involved in the treatment. One of the words Sherlock "saw" for Mary was clever so maybe John unconsciously looked for someone with Sherlock's qualities without his obliviousness.