Telos

The planet Telos was homeworld of the Cryons. It was also inhabited by the Cybermen, who used the technology of the Cryons after the they had attacked the planet and wiped out a large number of the Cryon population to entomb themselves in suspended animation inside the Cyber-tombs for centuries.

Telos was in the neighbouring star system to Krelos. (AUDIO: Return to Telos)

A world that began with "Tel", before Red Rocket Rising's Acting President Eileen Klint's message was cut off, existed on the edge of Red Rocket Rising's solar system. (AUDIO: Blood of the Daleks) Following Cybermen occupation, Telos was a grey, barren, rocky world. Diamonds, vastial and other minerals could be found on the planet. (TV: Attack of the Cybermen)

At one time Cryons, who died instantly when exposed to temperatures above zero degrees, lived on Telos. If the Cryons ventured onto the surface, they would boil. The Cryons moved under the surface when it became too warm, constructing underground cities refrigerated to the sub-zero temperatures the Cryons needed to survive. After the destruction of Mondas in 1986, (PROSE: Attack of the Cybermen) the Cybermen later came to steal the refrigerated cities to use as repositories of Cybermen cryonically frozen in suspended animation. The Cybermen killed most of the Cryons. Some survived, though not many. (TV: Attack of the Cybermen)