"Existence" is the twenty-first episode and eighth season finale of the science fiction television series The X-Files and 182nd episode overall. The episode first premiered on Fox in the United States on May 20, 2001, and subsequently aired in the United Kingdom on June 28, 2001 on Sky1. It was written by executive producer Chris Carter and directed by Kim Manners. "Existence" earned a Nielsen household rating of 8.4 and was watched by 8.58 million households and 14 million viewers, overall.