databank
900 year diary
moonbase
A sprawling base where Earth's weather was controlled via the Gravitron. The moonbase crew had been struck down by a disease which attacked the human nervous system. When the Doctor arrived he quickly discovered that Cybermen were inside the base, poisoning the sugar supply. They intended taking over the Gravitron via mesmerised crewmen who would destroy Earth by altering its weather. The Cybermen could not use the Gravitron themselves because of the gravitational forces it used. The Doctor turned this against them, reversing the Cybermen's internal gravity and shooting them off the moon's surface and into space.