SG-1 investigates a crashed space ship on a desolate planet. They find the ship full of people in suspended animation pods. Then something happens that knocks out the separated team. As they awaken, all of them seem fine, except for Jackson, who now appears to have a multiple personality disorder.

Back at the SGC, they learn Jackson’s mind has been invaded by several of the suspended consciences from the ship. Can they remove them, and save Jackson? Or, will Jackson be left going continually from one consciences to the next!