"Ugh." Far too many Doctors for one place. And speaking of, that this place can even support the temporocausal fallout from such a thing for any sustained period of time is surprising. Whoever is running the show must be doing so with the help of an immense power source. And instantly the Master covets it.

That the Doctor has a TARDIS and yet continues to be here tells the Master all he needs to know about the current usefulness of said TARDIS. Undoubtedly something he'll have to fix himself. He does not tell Me any of this either, of course.

"How long has the idiot been stuck here?" That the Doctor would choose to be here would never cross his mind.