Prison ship

You may be looking for the Minotaur's prison ship.

A prison ship was a vessel used as a prison.

A Qetesh prison ship.

A human slave of the Daleks on Skaro referred to having been captured from a space shuttle, with the rest of the crew kept in a prison ship in space. (TV: Destiny of the Daleks)

In the Qetesh society, those who were condemned to exile would be placed in sphere-shaped prison ships, where they would be trapped for eternity with only a game system for company. (TV: Goodbye, Sarah Jane Smith)

The Genesis Ark was a dimensionally transcendental prison ship created by the Time Lords to house millions of captured Daleks during the Last Great Time War. (TV: Doomsday)

The Eleventh Doctor discovered a Minotaur who fed on faith in a prison ship disguised as a 1980s Earth hotel. (TV: The God Complex)