After infecting the prison guards' basketball team with a sexual-enhancement virus, Lister and Rimmer are sent to the hole.

In an attempt to bring Pete the sparrow back to life, the Red Dwarfers inadvertently cause him to devolve into a tyrannosaur that stalks the ship.

The series concludes as a mysterious life form invades the Red Dwarf courtesy of an escape pod and starts eating away at the ship.