Trivia: The rock band Filter contributed music to this show, including their hit single "Hey Man Nice Shot" being used in the season 3 episode "D.P.O." as well as appearing on a couple X-Files soundtracks. Filter's lead singer Richard Patrick is the younger brother of Robert Patrick, who would later be cast in this show as Agent John Doggett.Phaneron
Trivia: Throughout the course of its initial nine-year run, The X-Files had crossovers with 3 other television shows: the short-lived Millennium in the season 7 episode "Millennium," COPS in the season 7 episode "X-COPS" and Homicide: Life on the Street in the season 5 episode "Unusual Suspects." The crossover with Homicide: Life on the Street is especially noteworthy as that show was produced by a different network. The X-Files also had a non-canon crossover with The Simpsons in their season 8 episode "The Springfield Files."Phaneron
Trivia: The echo effect in the series' theme tune was created purely by accident. Composer Mark Snow created the effect by resting his hand and arm on a keyboard which had an echo effect setting that had accidentally been turned on. Snow was so impressed with the riff that he wrote the theme around it.