Exo III

Exo III was a planet once inhabited by a group of Great Old Ones who left their bodies at some point in the Universe's distant past. Archaeologist Bernice Summerfield explored the planet's tunnels and saw images of them depicting them walling their bodies in a citadel. The images were carved in living rock millions of years earlier and were identical to older carvings on Veltroch as well as those on many other planets including Earth. (NA: White Darkness)

Around 59,000 BC, the Gubbage Cone's galactic empire encompassed Exo III which by then had a race of androids. (MA: The Crystal Bucephalus)

Behind the scenes

 * Exo III is a planet from the original Star Trek series episode "What Are Little Girls Made Of?". It was a planet whose androids had been built by the "Old Ones" before the androids killed them.
 * Robert Bloch, the episode's writer, was a horror writer who had been associated with H. P. Lovecraft. Other references to Bloch's writing in White Darkness were Norman Bates, Robert Blake, Ludwig Prinn, and the De Vermis Mysteriis.