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."
Agent Doggett heads an FBI manhunt to locate Mulder. Scully and Skinner also search, using information supplied by the Lone Gunmen.
Scully leads Skinner and an unhappy Doggett to Arizona to protect child prodigy Gibson Praise from an alien bounty hunter disguised as the missing Mulder.
Scully and Doggett investigate several killings involving a terrifying bat-like creature.
Scully is trapped in a desolate area where the townspeople appear to worship a hitchhiker.
A little boy who vanished ten years ago suddenly reappears - but he has not aged a day.
A man accused of killing his wife realises that he has been given a chance to correct past mistakes.
Doggett investigates a cult leader who appears to be able to project himself into other people's dreams.
Doggett and Scully investigate two shady brothers who run a rat extermination business, one of whom may be a killer with X-Ray vision.
A man believed to be dead from Gulf War Syndrome comes back to life and slowly turns into metal while taking revenge on those who made him that way.
Doggett and Scully pursue an Indian mystic who can manipulate the human mind.
Doggett tries to solve a mystery involving Mulder and a legendary creature linked to American Indian folklore.
Doggett and a team of experts attempt to solve the mystery behind strange deaths in a Boston subway tunnel.
Scully digs deeper into reports of alien fertilisation of humans, and begins to question her own pregnancy.
Jeremiah Smith appears out of nowhere and formerly dead abductees are coming back to life, giving Scully and Skinner the idea that Mulder may have a shot at still being alive.
When a former abductee wakes from the dead, Scully pins her hopes on resurrecting the recently buried Mulder.
A census worker's attempt to warn the White House about an alien invasion leads Mulder on a quest to access secret data.
The agents search for a man who may have been connected with the death of Doggett's son years earlier, and who may be possessed.
Mulder and Doggett become trapped on an oil rig manned by crewmen infected with the mysterious black oil virus.
A bizarre reptilian creature captures Doggett and his new Mulder-obsessed partner underground and only an X-Files deposed Mulder can help them.
With an unstoppable killing machine on the loose, Mulder, Doggett and Skinner work to protect Scully's unborn child.
With Scully about to give birth and alien super-soldiers closing in, Doggett, Mulder and Skinner try to work out who can be trusted.