Vastra nods. "I'm wary of abducting one of these cyberm-- robots. We're calling them robots here, yes. I'm wary of abducting one of these robots, and its fellows noticing it has gone missing. It would be quite the mess if we cracked one open and discovered as we were dissecting it that it's linked to others. Or worse, putting out a tracking beacon.

"Gathering the parts seems the safest direction. At least that way we aren't mucking about with calling attention to ourselves before we're ready."