Midnight (planet)

Midnight was an airless planet in the system of the X-tonic star Xion, composed mostly of diamond glaciers and mountains which humans had colonised.

Features
The planet's diamond-based geology was active and diamond falls were a common occurrence. Earthquakes, however, were thought to be impossible. The planet had no air, (TV: Midnight) and due to the destructive X-tonic radiation of its sun, it was thought that no life was possible on the planet, be it carbon-based, hydrogen-based, silicates, gas beings or other. (WC: )

Midnight also had a Sapphire Waterfall. (TV: Midnight, WC: )

Leisure planet
Despite the hostile environment, the Leisure Palace Company turned it into a leisure planet to take advantage of its spectacular views. Since no human could walk on the surface or even touch the planet's diamonds, Leisure palaces were lowered from space. There was a spa, which had an anti-gravity restaurant, and a bus company called Crusader Tours offered sightseeing trips to the planet's picturesque locations, such as the Sapphire Waterfall, which had its own Waterfall Palace. Its other tourist attractions included Winter Witch Canyon and the Multifaceted Coast. Many of these tourist attractions were surrounded by large glass domes, providing protection from the X-tonic sunlight. According to Donna Noble, the travel brochures stated that the glass in these domes was fifteen feet thick. (TV: Midnight)

On his visit to Midnight with Donna Noble, the Tenth Doctor found that some kind of life-form was able to survive on the planet's surface. This was proven when a mysterious being attacked one of the shuttle buses. After having barely survived the attack on the bus, the Doctor warned the company about the danger and the Leisure Palace was removed so whatever destructive force existed upon the planet was left undisturbed. (TV: Midnight)

Donna told her grandfather Wilfred about Midnight, and that it was made from diamonds. He relayed the story briefly to Rose Tyler when she saved him and Sylvia from a Dalek when the Earth was dragged to the Medusa Cascade. (TV: The Stolen Earth)