Don't talk to Mycroft - he's only been here a few weeks and is doing whatever he can to control my life.

[Sherlock perks his ears at "someone." No matter...]

This place is called Somarium. People from different worlds are all pulled here - I believe for an experiment, though I have yet to discover what kind. A couple of weeks ago, we were attacked by... Natives, I guess, though I doubt anyone is native to this place. I arranged to be kidnapped, I was planning to become one of their side to figure out what was going on, but the other hostages decided to brake out.

Then the rest of the people here raided where we were held captive.

[And no that doesn't explain why Sherlock's in hospital, but it catches John up.]