Fred leaned back in her chair and watched him work. She didn't have really much else to do. Although, she probably would have liked to have a look at his sonic screwdriver, not that she'd ever ask for such. That seemed a little rude, and she'd also have to ask how it works, or if she could take it apart. No, she just sat there and watched him do whatever it was he was doing...
"Doctor, what exactly are you doing?" He hadn't exactly explained had he? That's what she got for talking too much probably; she didn't hear him explain what he was doing. Then again, the Doctor wasn't always one to explain. Sometimes he just acted and expected people to understand or not understand. She smiled hoping he'd explain whatever he might be working on.
"We. We're different. From what I can guess is that the City makes people. Or has people who've been here so long they're part of it. They seem different; they don't look different, not exactly, but they feel different. Like they aren't as real as we are, or maybe they are, but not the same sort of real. I bet they were born here, for generations. It's like on Pylea, I could tell that I was different and that Cordy was different. We were different because we weren't born on Pylea. IT's like that here. Pylea's a demon dimension." Fred added quickly just in case he was curious.