THE X-FILES comes to a conclusion with this series finale, the culmination of nine seasons of unexplained phenomena and complex mysteries. The reappearance of the long-missing Mulder (David Duchovny) brings about a military trial in which Scully (Gillian Anderson) and Skinner (Mitch Pileggi) must defend him and prove the existence of the conspiracies they know to be real. As the episode attempts tie together the numerous loose ends, various characters reappear to bring the series to a close.