"I don't suppose we could just leave and make them someone else's problem? No, didn't think so," she said without giving him a chance to reply. "I don't suppose you have a sonic or some other sort of scanning device? Something that can tell us if they've ever been alive, or if they've always been what they seem to be?"

Because she did have one idea to find out if they were actually Angels, she just didn't much care for it. She tried to remind herself that it wouldn't be dying. Not really. It would just be going back in time. She'd done that loads of times. Just... usually not without a Tardis.