 Kryten captures the nanobots and gives them a good piece of his mind.He tells them to construct a new arm for Lister and to reconstruct "Red Dwarf" out of the sands of the planet below.The nanobots follow Kryten's orders but, perhaps feeling guilty for the all the trouble they've caused, they seemingly overcompensate by giving Lister an upgrade - giving him the body of a muscular bodybuilder.