Diana Goddard: (about the Dalek) It's been on Earth for over fifty years. Sold at private auction, moving from one collection to another. Why would it be a threat now?
The Doctor: Because I'm here. How did it get to Earth? Does anyone know?
Diana Goddard: Records say it came from the sky like a meteorite. It fell to Earth on the Ascension Islands, burned in its crater for three days before anybody could get near it. And all that time, it was screaming. It must have gone insane.