S05E08
7.2
The Hungry Earth (1)
7.2(68)May 22, 2010
In 2020, the most ambitious drilling project in history is under way. Dr Nasreen Chaudry and her team have reached 21 kilometers into the Earth's crust - but something is stirring far below. Amy Pond discovers there's nowhere to run when you can't even trust the ground at your feet.
Based on 68 votes