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.