The entire Earth’s being sterilized. This, and other places like it, are all that’s left of the human race. We might hold out for awhile, but nothing can stop those creatures. They’ll get through in the end; the walls aren’t that old. And there’s nothing I can do to stop them. There used to be laws stopping this kind of thing from happening - my people would have stopped this. But they’re all gone. And now, I’m going the same way. 

And Time Lords-what are they for, exactly?

He’s real. I’ve seen him. I’ve met him- just once. And then… I let him fly away.

Are we safe?  Can we move around and stuff?