Titan III

Titan III was a desolate asteroid which was home to a safehouse used by Azmael after abducting Romulus and Remus Sylvest.

History
Hugo Lang, who had been pursuing Romulus and Remus, was shot down over the planet and crashed there. He was rescued by the Sixth Doctor, who had come to Titan III to atone for almost killing Peri Brown shortly after his regeneration by becoming a hermit there. The three of them were captured by Azmael and imprisoned, but unknown to him, Noma had set the base to self-destruct. The Doctor and his friends escaped, and pursued Azmael to Jaconda. (TV: The Twin Dilemma)