The third season of the American science fiction television series The X-Files commenced airing on Fox in the United States on September 22, 1995, concluded on the same channel on May 17, 1996, and contained 24 episodes. The season continues to follow the cases of FBI special agents Fox Mulder and Dana Scully, portrayed by David Duchovny and Gillian Anderson respectively, who investigate paranormal or supernatural cases, known as X-Files by the FBI.
The season features the conclusion of several plot-lines introduced in season two, while also introducing several new plot elements. Major plot arcs include an elaborate conspiracy being discovered when a fake alien autopsy video is acquired by Mulder, Scully's search for the killer of her sister, and the mystery surrounding X (Steven Williams). Pivotal characters such as the First Elder (Don S. Williams) and the alien virus black oil were first introduced in this season. In addition, the season features a wide variety of "Monster-of-the-Week" episodes, which feature stand-alone stories not of influence to the wider mythology of the series.
Late in World War II, the Brits still want their hands on a German Enigma, the typewriter-like machine that constructs and sends coded messages. Parachuting behind enemy lines - with two days to find the factory where Enigmas are made, grab one, and get out - are an unlikely quartet: a queen, a pencil pusher, a bookworm, and an almost secret agent. Plus they are all dressed as women, with only a crash course from the queen. They reach their destination, rendezvous with their German contact, a lovely librarian, and start their search. They seemed doomed to fail; is this a fool's errand?
The fifth season of the science fiction television series The X-Files commenced airing on the Fox network in the United States on November 2, 1997, concluding on the same channel on May 17, 1998, and contained 20 episodes. The season was the last in Vancouver, Canada; subsequent episodes would be shot in Los Angeles, California. In addition, this was the first season of the show where the course of the story was planned in advance, due to the 1998 The X-Files feature film being filmed before it, but schedule to be released after it aired.
The fifth season of the series focused heavily on FBI federal agents Fox Mulder's (David Duchovny) loss of faith in the existence of extraterrestrials and his partner, Dana Scully's (Gillian Anderson), resurgence of health following her bout with cancer. New characters were also introduced, including agents Jeffrey Spender (Chris Owens) and Diana Fowley (Mimi Rogers) and the psychic Gibson Praise (Jeff Gulka). The finale, "The End", led up to both the 1998 film and the sixth season premiere "The Beginning".