A seismologist and his son alert the authorities to the presence of a rogue wildcat mining operation, only for the machinery to trigger an earthquake that swallows the equipment - along with the father and son. Gordon must attempt a daring underground rescue of the boy and his injured father, while Virgil has to find a way to shut down the out-of-control rig.
Casts:
Rasmus Hardiker, Chris Jarman, David Menkin, David Graham, Sandra Dickinson, Jenna Coleman, Adjoa Andoh, Thomas Brodie-Sangster, Angel Coulby, Kayvan Novak, Rosamund Pike, Teresa Gallagher