Nigel Lomax

Sir Nigel Lomax was the head of Station 40, a solar power complex in Wales in the 1970s. An expert on volcanoes, he made contact with a creature in a volcano. Colluding with the creature, he attempted to use the equipment at Station 40 to turn Earth into a "fire planet". However, the Third Doctor stopped his plan and Sir Nigel was killed by the creature. (COMIC: Back to the Sun)