"There's only a limited number of people with this awareness over reality. That restricts the total pool of suspects to our 200, as you put it, and the people to do with Retrospec itself. It's a crazy idea, but it's at least possible."

Peter isn't saying this for the purpose of raising alarm or paranoia. Despite the shockingness of the suggestion, his tone stays as if he's methodically running down a list. "An enemy who knows how to use the same sort of technology as Retrospec is much more dangerous than one Retrospec user on a trip, but can still countered."