John Voce

An apparent dinosaur sighting leads Evolutionary Zoologist Nick Cutter and his team to the Forest of Dean-the same forest his wife disappeared into years ago. While searching for the mystery beast, they make an even stranger discovery.

While Clara is teaching one day, the Doctor travels on his own to 1600s London, where he encounters the immortal Ashildr, who has taken the name "Me."

Helen claims a predator from the future is behind disappearances, and she joins her estranged husband to stop further attacks.