Planet (Underworld)

This planet formed the gravitational pull of debris floating through a spiral nebula assembled into a nearly hollow planet around the hull of the ancient Minyan spaceship called the P7E.

Inside, it resembled a series of caverns and caves with an atmosphere breathable to Human and humanoid life forms. A second Minyan ship, the R1C, crewed by near-immortals, who had extended their lives by regeneration, as well as the Doctor and his companions K9 and Leela found the other last surviving Minyans, who had lived there lives in thrall to the computer known as the Oracle, not knowing of their origins, let alone that nuclear war had destroyed their original homeworld.

After the defeat of the Oracle, the inhabitants headed aboard the R1C for a new planet, Minyos II. (DW: Underworld)