Volag-Noc

Volag-Nok was an icy cold prison planet. It was run by robot Warders and the android Governor Lok. The prison was taken over by Gurney and the real governor was locked up. After the Doctor had arrived, he had released Lok and Gurney was overthrown, yet killed on the surface by Baltazar.

Baltazar was imprisoned on Volag-Nok three times. Here he had first learned of the Infinite, and found the chip carriers were fellow prisoners Gruney and Captain Kaliko, and the messager Meregrass. (DW: The Infinite Quest)