STORY
PLOTLINE
The
Doctor is an observer and UNIT are providing security cover at an experimental
drilling project designed to penetrate the Earth's crust and release a previously-untapped
source of energy, named Stahlman's Gas after its discoverer. Professor Stahlman
dismisses the concerns of the project's Executive Director Sir Keith Gold and
exceeds all safety margins in order to expedite the work.
Soon however the drill head starts to leak an oily green liquid that transforms
those who touch it into vicious primeval creatures with a craving for heat. The
Doctor is accidentally transported by the partially-repaired TARDIS control console
into a parallel universe where England is ruled by a military dictatorship.
