Kastria

Kastria was a desolate planet inhabited by the Kastrians.

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

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

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