"Definitely not more science people," Cosima says, firmly. "You know the demons that attacked when you first came through the green rift? They're trying to keep them from hurting people. They've got some other goals too, but that's one of the big ones."

She holds up her hand, after a quick glance around to make sure it's not going to draw too much unwanted attention. "We can help them, because of this thing. I've been doing that. I don't know why we came through and none of our sisters have so far."