Mechanistria

Mechanistria was a planet and the home to the Mechanistrians and the Korad.

History
Mechanistria, once known as Korad, was a green world similar to Earth and was home to a near-human race, known as the Korad. At some point in the Korads' technological evolution, the race split in two with the mechanic\lower class continuing to be known as Korad and the ruling upper class known as Mechanistrians or Wise Ones. The Mechanistrians began melding thier brains to the machines and saw this as their route to immortality and power and the world slowly lost its soil, surface water and plant life. By the time the Doctor arrived on the planet the entire surface was made of metal and hummed with the machinery that existed underneath. (DWA: Peril in Mechanistria)