“It’s 2015 and the most ambitious drilling project in history has reached deeper beneath the Earth’s crust than man has ever gone before – but now the ground itself is fighting back. The Doctor, Amy and Rory arrive in a tiny mining village and find themselves plunged into a battle against a deadly danger from a bygone age.”

Written by Chris Chibnall and guest starring Meera Syal (Goodness Gracious Me), the episode airs at 6.15pm on Saturday 22nd May.