Planet 12 of the Ridion Alliance
From Tardis Wiki, the free Doctor Who reference
Planet 12 of the Ridion Alliance was a planet belonging to the advanced Ridion Alliance, before it suffered a Seven Hundred Year War which turned most of the planet into a barren wastland and it's population descended into a dark age. Among the locations on the planet were the ruins of the Palace of Hy-Ridion. (WC: The Lonely Computer)
