"I see," Sherlock says. "Assuming such roles is a practice Watson and I are quite familiar with as well. At one point we were able to survey a suspect's home by telling him Watson was a world class security expert."

"That was a little more believable than the time you said I was a bodyguard with multiple black belts," Joan remarks dryly.

"You can hold your own in a fight," he says.

"Not the same thing."