"Two Fathers" is the eleventh episode of the sixth season and the 128th episode overall of the science fiction television series The X-Files. The episode first aired in the United States and Canada on February 7, 1999, on the Fox Network and subsequently aired in the United Kingdom on Sky1. It was written by executive producers Chris Carter and Frank Spotnitz and directed by Kim Manners. The episode earned a Nielsen rating of 11.5 and was viewed by a total of 18.81 million viewers.