Volag-Noc

Volag-Noc was a cold, snowy planet in the Mutter's Spiral and was used as a prison world by humans.

History
At some point, the Tenth Doctor was sent to Volag-Noc by the Shadow Proclamation, along with a Sontaran, an Ogron and a Draconian. They were shot down before they reached Volag-Noc. (COMIC: Fugitive)

In the 42nd century, Volag-Noc was run by robot Wardens and the android Governor Lok. Baltazar had been sent there three times. Here he had first learned of the Infinite and found the chip carriers were fellow prisoners Gurney, Captain Kaliko and the messenger Ulysees Meregrass. Kaliko and Baltazar escaped Volag-Noc. Gurney took over the prison and locked up Governor Lok. When the Tenth Doctor came to Volag-Noc, he freed the Governor, who tried to kill all the prisoners, forcing the Doctor to shut him down. When the Doctor was trapped on the planet, he spent three years repairing the prison. (TV: The Infinite Quest)

In the 251st century, Volag-Noc was still in use. Dirk Slipstream was sent there by the Doctor for murdering six hundred people, though he escaped after six years. (PROSE: Night of the Humans)

Behind the scenes

 * Volag-Noc is similar to the Klingon prison planet of Rura Penthe from the Star Trek franchise. Both are extremely cold prison worlds.