Mycroft frowned. He wasn't used to get called at his door. Demanding ambassadors called him at any time of day, of course, but they seldom bothered to walk all the way to his quarters. And it wasn't like he had many social connections who might come by unannounced.

He set aside his drink and stood to receive his guest. "Doors," he said, and the door slid open. "Mr. Echolls. Not a social call, I presume."