The X-files 1x16 May 2026

He blames himself for a past mistake that cost a fellow agent's life.

She provides the medical backbone to explain the "fountain of youth" gone wrong.

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

"Young at Heart" proves that the most terrifying monsters aren't always from outer space. Sometimes, they are created in a lab right here on Earth. The episode leaves us wondering: how far would you go to live forever? 🛸

A disgraced doctor used progeria research to reverse Barnett's aging.