Despite being an antagonist for the first three seasons, Scorpius joins the crew of Moya for the final season to protect Crichton after his Command Carrier is destroyed and he is hunted by the Peacekeepers. He becomes a more or less trustworthy crewmember though he looks for any chance to get Crichton's knowledge and forms a relationship with Sikozu. At the end of the series, he returns to the Peacekeepers and in "The Peacekeeper Wars", instigates a war between them and the Scarrens. At the end of "The Peacekeeper Wars" he finally gets what he wants when Crichton uses a wormhole weapon on the Scarrens and Peacekeepers and is horrified, calling it "madness", finally understanding the danger of what he sought. He is last seen on Moya smiling as the Scarrens and Peacekeepers sign a peace treaty.