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 ship 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 RC1, 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 lived under the thrall of the computer known as the Oracle. (DW: Underworld)