The seventh season of the American science fiction television series The X-Files commenced airing on the Fox network in the United States on November 7, 1999, concluded on May 21, 2000, and consists of twenty-two episodes. Taking place after the destruction of the Syndicate, this season marks the end of various other story lines; during this season, Fox Mulder (David Duchovny) learned the true fate of his sister, Samantha. Before the broadcasting for the season began, Duchovny sued Fox and eventually announced his decision to leave the show. As a result, the season would be the last to feature Duchovny in a full-time capacity until the show's tenth season (which aired in 2016), although he would return in seasons 8 and 9 as an intermittent main character. Due to this eventual character change, this season would be the last to feature the original opening sequence for the series, as the two later years updated the intro in an attempt to renew and revive the series. The seventh-season premiere "The Sixth Extinction", debuted with a Nielsen rating of 10.6 and was viewed by 17.82 million viewers, marking a noticeable drop in viewership since the sixth season. The series fell from number 12 to number 29 for the 1999–2000 television year. Critically, the show's seventh season received mixed to positive reviews; many reviewers felt that the show still produced good episodes, but that it was the weakest of the Duchovny and Anderson seasons of the show. Plot overview After the events of the season six finale, Walter Skinner (Mitch Pileggi) and Michael Kritschgau (John Finn) are desperately attempting to find the truth behind the so-called alien object. Meanwhile, Fox Mulder (David Duchovny) is still imprisoned by his own frenetic brain activity. Dana Scully (Gillian Anderson) and Skinner are unaware of FBI Special Agent Diana Fowley's (Mimi Rogers) duplicity—she is working for Cigarette Smoking Man (William B. Davis). Scully then travels to Africa to unravel the secrets of the alien artifacts, finding something that looks like a spaceship buried under the shoreline off the Côte d'Ivoire coast. The object may prove that life originated elsewhere, and all religion is based on the Navajo contact with alien life. Unsuccessful, Scully returns from Africa to revisit Mulder in Washington, D.C., but instead she finds out that he has disappeared. She contacts Kritschgau and Skinner to find her partner. Cigarette Smoking Man has taken Mulder to