Lunargov III

Lunargov III was a planet, described by Madrigor as his "travelling home".

The planet had fireproof, plastic vegetation, because real plants couldn't stand the frequent change of atmosphere caused by the nomadic life of the rogue Time Lord. The planet also included Madrigor's home, where he resided with his Terrestoids and where the control room was located.

The planet was apparently sent by the Third Doctor somewhere where Madrigor couldn't pose a threat. (PROSE: The Time Thief)