For Abed

The reappearance of Amy Pond had made Sherlock question everything he'd thought he knew about the Sphere incident. He re-interviewed many of his fellow passengers, ran blood tests on anyone who would submit to them [extracting more than a pint from Amy herself before John stepped in for 'medical reasons'], and today he was re-examining the hub, where the Sphere itself had first appeared.

He was crouched low, checking the floor panels for any sign of erosion or change, and heard a familiar voice narrating his actions from the walkway above him.

"Hello, Abed." He called without looking up. Far from an irritation, Abed's presence was fortuitous, as he'd been on Sherlock's list of interviews, and he wouldn't be put off if Sherlock continued with what he was doing as they talked.