While Crichton is being tortured by Scorpius in the Aurora Chair, Scorpius uncovers a repressed memory of Jack. It is revealed that Jack, as an apology, implanted wormhole knowledge in Crichton's brain so he would be able to return to Earth faster, and erased the memory because the Ancients believe that if one does not discover the knowledge by themselves, they do not deserve it. This proves crucial to the rest of the series, establishing the central arc of the Peacekeepers and later the Scarrans pursuing John for his wormhole knowledge.