Knosson

 was a planet apparently without a native sapient species in a trinary star system. Human ADF pilot, Ral Shannon, was marooned there when his ship crash landed after a Dalek attack. He eked out a living there for three years after arrival before the Daleks returned. Defeating this second Dalek attack party gave Shannon access to the Dalek ship, and thus a way off the planet. However, he decided to blow up the Dalek ship and remain marooned on Knosson, instead. (DWA: The Castaway) This decision arguably changed Knosson's status from "uninhabited" to "population: 1".

Flora and fauna
Despite the lack of sentient life forms, Shannon found the planet did have abundant flora and fauna. It had deep forests. Shannon found that some of its flora bore edible fruits. It had many large, predatory animals, as well as wasp-like insects, but Shannon had not bothered to name any of them.

Geology
Knosson was a geologically active planet with what Shannon called "volcanoes", but were more likely vents — small holes in the earth that would unexpectedly spew lava. The planet had bodies of water, as well as lakes of deadly acid.