Project Inferno is designed to drill down to the center of the Earth, where it will release a wonderful new energy source called Stahlman's Gas named after the project's director. But the Doctor realizes that unleashing Stahlman's Gas will have horrible consequences from the planet, fears confirmed when a power surge in the TARDIS console sends him to a hostile parallel universe where the project is nearing completion. Written by
Did You Know?
This serial was released by the BBC on video cassette in the UK in May 1994. See more