 Having survived Scorpius' attack, the doctor saves Crichton by using biological material from a suitable donor – an alien called an Interon which may be a cousin species to humans.Scorpius fools Crais into thinking he is dead to cover his escape with the neural chip, and Zhaan revives Aeryn, but at the cost of her own life.Feeling guilty over the death of the Interon donor, Crichton has the donor's still living relative brought aboard – an arrogant scientist called Jool.