I had the third bedroom in the flat as a lab for awhile. [Few too many arguments with the medical sort here that he... doubted he could get a medical lab like Bart's at his disposal.] But that proved confining.

[And John complained. Not complained, but Sherlock knew that look. The "Oh God, what are you brewing now?" and "You're going to burn down the flat, aren't you?" and other such looks.]

So Temperance-- Doctor Temperance Brennan, forensic anthropologist at the Jeffersonian and consultant to the FBI, partnered with Special Agent Seeley Booth-- and I took down the wall between the two spare bedrooms in her flat, and we're sharing the laboratory space.

[He actually sounds vaguely happy, too. Because-- yay, science.]