FBI special agents investigate unexplained cases known as `X-Files'. Though the government is convinced that the outlandish reports are false, conspiracy theorist Fox Mulder and realist Dana Scully, for most of the series, stop at nothing to prove that "the truth is out there."
A surveillance tape threatens to derail Doggett's investigation of Deputy Director Kersh, and Mulder disappears.
Questions are raised about Scully's baby. Doggett continues his investigation of Deputy Director Kersh.
Doggett and Reyes discover a link between a mental patient and the ritual murder of a couple.
Reyes suspects that a maniacal killer, who critically wounds Doggett, may have entered our world from a parallel dimension.
Scully, Doggett and Reyes investigate when a teenager dies while performing a daredevil feat for a television show.
A couple are convinced that their infant possesses unworldly powers. Scully is asked to contact Mulder.
Doggett awakes with amnesia in a corrupt and violent Mexican town, and gets drawn into its people-smuggling trade. Can Scully and Reyes find him?
Reyes is drawn to a bizarre case in Virginia, where two members of an anger management group have been found skinned alive.
When a UFO cult in Canada unearths a spacecraft similar to the one discovered in Africa, a plot is set in motion to kill Scully's son.
Scully's baby becomes a bargaining chip for a psychotic UFO cult that feels the baby is ultimately connected to a UFO they have uncovered.
Reyes is injured in an accident and wakes in a place between life and death. Her only hope lies with a hospital worker who can bridge both worlds.
When DNA evidence clears a man jailed for a series of murders thirteen years ago, Doggett refuses to accept his innocence and becomes obsessed with putting him back behind bars.
In the race to catch a serial killer, Scully and Reyes find themselves relying on numerology, their powers of deduction, and a mysterious, card-playing stranger.
A woman appears to have died by stabbing herself repeatedly, but her young son tells Reyes and Doggett that she was killed by monsters.
When 'man in black' Morris Fletcher claims to know the identity of a supersoldier, Reyes and Doggett turn to the Lone Gunmen for help.
Doggett catches a heavily scarred man breaking into the office and suspects that he might be Mulder. Scully's fears for her son's safety increase.
An FBI cadet with an uncanny instinct for solving crimes sheds new light on the murder of Doggett's son.
A series of deaths seem to be connected to a man obsessed with The Brady Bunch TV series.
When Mulder is accused of murdering supersoldier Knowle Rohrer, the U.S. military puts him on trial.
At Mulder's murder trial, the U.S. military hears testimony from a series of defence witnesses who support Mulder's conspiracy theories.