Kastria

Kastria was a desolate planet inhabited by the Kastrians.

History
As the Kastrian fleet was utterly destroyed, Kastria was ravaged when the Mad Mind of Bophemeral turned their computers against them in the Millennium War. (PDA: The Quantum Archangel)

At its best, it was barren, cold and constantly ravaged by solar winds. A Kastrian named Eldrad created a barrier to protect Kastria and created new silicon-based bodies to deal with the environment. These efforts were for naught, since the barrier was destroyed and the Kastrians were made extinct.

One hundred and fifty million years later, the Fourth Doctor and Sarah Jane Smith returned Eldrad to Kastria, now a dead planet. (DW: The Hand of Fear)