An early thread today because I don't know whether I'll be back in time.
Remember this episode will air a bit earlier than usual, at 18:15.

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. And when the Doctor, Amy and Rory arrive in a tiny mining village it's not long before they find themselves plunged into a battle against a deadly danger from a bygone age.
Remember this episode will air a bit earlier than usual, at 18:15.