 However, while Lister is restored to his human body, Kryten finds himself turned into a human, due to his brain being part-organic.Returning to "Red Dwarf", Kryten is initially ecstatic at being human, but finds he cannot conduct certain functions that he did as a mechanoid, and soon regrets the change after he insults his mechanoid spare heads, as well as revealing his sexual arousal to machines in a machine catalogue that he reads.The group agree to help him return to his original form, but Rimmer suggests they use a test subject first on the DNA modifier as a precaution.