Flip, too, is about to learn Erys’ secret. But once you know Erys’ secret, you can never escape. Space travellers are warned to keep away from the area of the planet Asphya and its unremarkable moon Erys.
And so Zoe recalls a journey to Earth in the past, to the funeral of a young woman called Meg, who was involved in scientific experiments that are bringing forth sinister alien creatures. Only the Doctor, Jamie and Zoe can stop them….