"One Breath" is the eighth episode of the second season of the American science fiction television series "The X-Files". It premiered on the Fox network on . It was written by Glen Morgan and James Wong, directed by R. W. Goodwin, and featured guest appearances by Melinda McGraw, Sheila Larken and Don S. Davis. The episode helped to explore the series' overarching mythology. "One Breath" earned a Nielsen household rating of 9.5, being watched by 9.1 million households in its initial broadcast. The episode received mostly positive reviews from television critics.