The series was filmed in Vancouver, British Columbia, though most episodes were ostensibly set in or around Seattle, Washington. The theme music was composed by Mark Snow, who also created the distinctive theme music for "The X-Files". Although the series premiered with impressive ratings, viewership declined throughout its three-season run, and it was canceled by Fox in early 1999. A seventh-season episode of "The X-Files", titled "Millennium", featured the Millennium Group and Frank Black, as a way of giving the show some closure.