Exo III

Exo III is a fictional planet created by Robert Bloch for the episode "What Are Little Girls Made Of?" of the science fiction television series Star Trek. While not explicitly linked to the Cthulhu Mythos, the episode contains references to an ancient humanoid race known as the "Old Ones".
Exo III was subsequently incorporated into the Doctor Who universe, and referenced in the Mythos crossover novel White Darkness as a world formerly inhabited by the Great Old Ones.
==History==
Rock carvings depicting the Great Old Ones have been found in the tunnels of Exo III, dating back to millions of years. (: White Darkness)
About half a million years ago, a humanoid species known as the Old Ones lived on the planet, and moved to the underground as the sun began to cool and the surface became increasingly inhospitable. As a technologically advanced race, they built sapient androids in their image, and were eventually destroyed by their creations. (: "What Are Little Girls Made Of?")
Circa 59,000 BC, the androids of Exo III were part of the interstellar empire of the Gubbage Cones. (: The Crystal Bucephalus)
By the time of the 23rd century, Exo III was a harsh, inhospitable world covered in ice, and the androids themselves were practically extinct. (: "What Are Little Girls Made Of?")
==Behind the Mythos==
In the Star Trek episode, the Old Ones of Exo III were a humanoid species. In the Cthulhu Mythos, several species have been known as the "Old Ones", including at least one humanoid extraterrestrial race, the K'n-yanians, which worshiped Cthulhu.
==External links==
Category:Planets
Category:Locations Originating From Mythos-Adjacent Works