Crinoth

Crinoth was a planet settled by the Nimon with the aid of Sezom.(TV: The Horns of Nimon) It was in the same solar system as Skonnos, which was located far from Crinoth. (PROSE: Doctor Who and the Horns of Nimon)

After it was drained of resources and energy, the Nimon planned to move to Skonnos, making the journey using the energy released by Crinoth when it died. They were defeated by the Fourth Doctor and Romana, and so were stranded on Crinoth when it disintegrated. (TV: The Horns of Nimon)