The Doctor tries to get everyone to Rio, but nothing quite goes as planned. They arrive in a small Welsh village where the Doctor immediately senses that the ground isn't quite right. There is a drilling rig nearby that has reached a depth of 21 kilometers when odd things begin to happen. A local village man has disappeared and soon after Amy is swallowed into the ground. The Doctor realizes that the drilling has disturbed an ancient reptilian race that has lived deep underground for thousands upon thousands of years and who are determined to protect themselves against the 'apes' who live on the surface. Written by
Did You Know?
The church featured in this story is St Gwynno's Church in Llanwonno, Wales. See more
[Rory, Ambrose and Tony enter the room in which Alaya is being kept prisoner
You had to come and see me.
We are going to keep you safe.
Your tribe are going to give us back our people, in exchange for you.
[walks towards others, but is held back by chain
Shall I tell you what's really going to happen, apes? One of you will kill me. My death shall ignite a war, and every stinking ape shall be wiped from the surface of my beloved planet.
We won't allow that to happen.
I know apes better than ...
Doctor Who Theme
Written by Ron Grainer
Arranged by Murray Gold
Performed by BBC National Orchestra of Wales See more