Just then, Kryten picks up a ship on a death-dive into a black hole, containing one droid captain and a prisoner, so the crew venture aboard (with Rimmer staying behind).
Kryten and Lister realise the droid is a Mercenoid, who looks to sacrifice himself into the black hole in order to be rewarded in Silicon Heaven and is taking the prisoner with him.
After defeating the ship's hostile droid owner, they rescue the prisoner, who turns out to be a female felis sapien and quickly gets friendly with Cat.
Back onboard Red Dwarf, Cat and his new female friend run off to his quarters while Kryten examines the Mercenoid's personal black box.
In a more positive review, Tom Eames of Digital Spy called the episode, "a genuinely thrilling and hilarious instalment, and one which reminded us of the action-packed sci-fi era of series 4 and 5.