Sonic technology, integrated into everyday use. That's an incredible development. Daniel recalls Andrew's mention of his "people" - advanced enough to accomplish that? The air of nonchalance with which he discusses it would imply as much.

"Not particularly, no," he answers, drawing the words out warily. "I feel like - like I've been here before, though. Like maybe with someone else. Some - some other point in time?" Or several someone elses. Or - an intensely vivid memory of being caught underwater, pinned beneath something dragging and heavy, flickers in his head and he shudders. What does that even mean? Has he been here before? He feels like he'd remember - but then, Daniel's used to having thoughts and memories in his head that don't belong, or things he should be able to access but can't.

Maybe his joking suggestion of this being a dream really is a possibility.