"Our home worlds are safe, cut off from all this mess. For some people, the possibility of getting home is the only thing keeping them going. I don't believe that's going to be possible. I think we're here for good, and that's a good thing. A way back might be a way for this mess to reach our worlds. But if we're cut off, so is the danger."

Not good enough for Jack, or for the Doctor. They're still holding out hope. And there is a deep, desperate wish in Gwen's heart, that it'll work. Jack's done the impossible before, he can do this, right? Get her home to her little girl without bringing an unstoppable crystal calamity?

Gwen shakes her head. "Their hearts can be trusted. It's their minds you're worried about? I've seen the sort of tech that you're speaking of. Probably a very different kind, not sure what sort of 'artifacts' would work from your time period. But it exists. How would we be able to tell, if people were affected?"

She gazes around the room again, not in paranoia, but in the critical eye that Torchwood has given her. She knows these people, who, if anyone, is acting out of the ordinary?