In 2015, the most ambitious drilling project in history is under way. Dr. Nasreen Chaudhry and her team reached 21 kilometres 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.
EPISODE REVIEW - Pending - but in the meantime, "excellent" but, with the hot UK weather today, how many would have been watching? And Smith gets better and better and better.
Things to look out for...
DOCTOR WHO FOLKLORE The "ecocenes" (known as Silurians within DOCTOR WHO folklore) re-appear for the first time in this NEW SERIES.
DOCTOR WHO FOLKLORE There are several "nods" to the CLASSIC SERIES. A "heat-shield" defence barrier (THE DÆMONS); the ground "swallowing" people (FRONTIOS); deep earth drilling (INFERNO); Welsh mining village (THE GREEN DEATH).
DOCTOR WHO FOLKLORE The Doctor uses his "Opera Glasses" again as first seen in THE EMPTY CHILD.