As Mulder continues his search for a cure for Scully’s illness—and the identity of a mole operating from within the Bureau—he receives help from a most unlikely source.
In 1989, the Lone Gunmen meet for the very first time when they assist a woman who claims the government plans to use civilians as guinea pigs in a secret experiment.
Mulder and Scully search for the truth when an anthropologist discovers what could be the frozen remains of extraterrestrial life.
While celebrating Scully's birthday, Mulder learns of Max Fenig's death in a plane crash. What the agents soon discover is that the circumstances surrounding the crash may have been alien.
As the investigation into the crash of a commercial airliner continues...Mulder is placed under military arrest after he discovers the existence of a UFO crash site. Scully mourns the loss of a fellow agent.
A headless corpse walks out of a hospital morgue—triggering the search for a highly-evolved humanoid life form that possesses unimaginable regenerative powers.
A diplomatic courier carrying deadly cargo involves Agents Mulder and Scully in a dangerous web of intrigue, which leads Mulder on a trip to Russia.
An incarcerated serial killer claims Mulder’s sister was one of his many victims.
Scully recounts the investigation of an alleged UFO encounter for a famous author researching his latest novel.
Pursued by an Alien Bounty Hunter, Jeremiah Smith takes Mulder to a farm where he finds several girls who are clones of his sister.
The agents play a deadly game of cat-and-mouse with a killer who can control people’s minds.
An “alien autopsy” videotape and a Japanese diplomat’s murder spark Mulder’s search for a strange creature aboard a train. Scully encounters a group of people who reveal information about her disappearance.
When Mulder becomes trapped aboard a train rigged with an explosive device, Scully searches for the truth behind the government’s involvement with secret experiments.
The agents investigate the deaths of several young people who were apparently struck by lightning in the same small town.
As Scully faces possible dismissal from the F.B.I., a manhunt ensues for the missing Agent Mulder.
As Mulder searches for a killer capable of altering his shape, a woman who claims to be his long-lost sister suddenly appears.
The agents investigate a murder in a small town populated by devil worshipers.
Scully and Mulder hunt down a fetishist who collects pieces of the dead.
A former FBI agent who claims he was abducted by aliens takes several people hostage.
Mulder attempts to rescue Scully after she is abducted by a strange man who believes in UFOs.
Mulder pursues a humanoid, parasitic organism that uses sewage systems as its home.
Mulder searches for a Vietnam veteran who can project his consciousness into other people's minds.
Scully believes that the psychic predictions of a death row inmate are the only hope of apprehending a vicious murderer.
Mulder and Scully are sent to investigate when a team of geophysicists stationed at a remote Alaskan outpost is killed by a parasitic alien life form.
Mulder becomes obsessed with solving a case that closely parallels an encounter he experienced as a child.
Agent Dana Scully is instructed to debunk an FBI project dubbed "The X-Files" cases linked to the paranormal that have been reopened by Agent Fox Mulder.
Mulder and Scully investigate the strange disappearance of Lieutenant Colonel Robert Budahas, a test pilot for the military who experienced a psychotic episode and was supposedly hospitalized for treatment. Mulder suspects that Budahas may have met the same fate as six other pilots who mysteriously vanished from Ellens Air Base while participating in experimental aircraft test flights. He hints to Scully that the disappearance may be linked to the paranormal— classifying it as an “X-File” case.