Episode Recap: "Young at Heart" (1x16) Agent Fox Mulder faces a ghost from his past. John Barnett, a criminal Mulder sent away years ago, is back. But there’s a catch: Barnett should be dead. Even stranger, he seems to be getting younger. 🔍 The Investigation
A disgraced doctor used progeria research to reverse Barnett's aging. The X-Files 1x16
He blames himself for a past mistake that cost a fellow agent's life. Episode Recap: "Young at Heart" (1x16) Agent Fox