The X-Files (1993–2016) 
Two FBI agents, Fox Mulder the believer and Dana Scully the skeptic, investigate the strange and unexplained while hidden forces work to impede their efforts.
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The X-Files: Quagmire Rewatch Season 3, Episode 22
Mulder, Scully, and Queequeg go to Heuvelman's Lake, Georgia, to investigate the disappearance of a U.S. Forestry Service employee.
The X-Files: Avatar Rewatch Season 3, Episode 21
Assistant Director Walter Skinner refuses to sign his divorce papers at his lawyer's office, saying it can wait one more day, goes for a drink at a hotel bar, meets an attractive woman, spends the night in a hotel room with her, has one of his recurring nightmares about an old woman... and then wakes the next morning to find the woman he spent the night with lying dead beside him.
The X-Files: Hell Money Rewatch Season 3, Episode 19
Mulder and Scully investigate a series of deaths in San Francisco's Chinatown that turn out to be linked to a gambling ring where losers have to forfeit their own body parts for organ transplantation.
The X-Files: Teso Dos Bichos Rewatch Season 3, Episode 18
Mulder and Scully are asked to investigate a series of unexplained murders after archaeologists remove an ancient burial urn from a site in the Ecuadorian highlands.
The X-Files: Apocrypha (Part 2/2) Rewatch Season 3, Episode 16
Mulder continues his investigation of the black oil. Scully pursues the man who murdered her sister.
The X-Files: Piper Maru (Part 1/2) Rewatch Season 3, Episode 15
Mulder and Scully investigate the case of a diver from a French salvage ship called the Piper Maru who discovered a World War II fighter plane and, upon the ship's return to San Diego, proved to be the only member of his crew not exposed to harmfully extreme levels of radiation.
The X-Files: Grotesque Rewatch Season 3, Episode 14
Mulder and Scully become involved in the case of a serial killer who claims to have been possessed by a demonic entity.
The X-Files: Syzygy Rewatch Season 3, Episode 13
Mulder and Scully go to Comity, New Hampshire, to investigate some strange murders of teenagers that are possibly due to a rare planetary alignment.
The X-Files: War of the Coprophages Rewatch Season 3, Episode 12
Mulder investigates a series of deaths in which the victims were all attacked by cockroaches, while Scully enjoys a quiet evening at home.
The X-Files: Revelations Rewatch Season 3, Episode 11
After a series of religious frauds are murdered, Scully and Mulder become concerned about the safety of a 10-year-old boy who has been exhibiting signs of stigmata.
The X-Files: 731 (Part 2/2) Rewatch Season 3, Episode 10
Mulder explores a railway car used for secret experiments. Scully investigates the purpose and history of her alien implant.
The X-Files: Nisei (Part 1/2) Rewatch Season 3, Episode 9
Mulder's investigation of an alien autopsy video leads to a secret project with connections to unethical experiments done by Japanese scientists during World War II. Scully learns more about what happened during her alien abduction.
The X-Files: Oubliette Rewatch Season 3, Episode 8
When a young teenage girl is abducted from her bedroom at night, a fast food worker miles away collapses on the job, and the girl's blood is found on her clothes. When Mulder learns that the woman was kidnapped and held hostage for years as a child, he begins to believe that she may have a psychic connection to the missing girl.
The X-Files: The Walk Rewatch Season 3, Episode 7
Scully and Mulder are called to a VA hospital in Fort Evanston, Maryland, after a "phantom soldier" begins to target its officers, killing their families and destroying their lives.
The X-Files: 2Shy Rewatch Season 3, Episode 6
After a woman is found dead in her car in Cleveland with the body fat missing from her corpse, Mulder theorizes that her death is the work of a serial killer who preys on women via internet dating chat rooms.
The X-Files: The List Rewatch Season 3, Episode 5
After a condemned man vows that he will return to avenge himself by killing five men, Mulder and Scully are called to a Bradford County, Florida prison to investigate when a prison guard is found dead in his former cell.
The X-Files: D.P.O. Rewatch Season 3, Episode 3
Mulder and Scully go to Connerville, Oklahoma, to investigate a statistically improbable spate of deaths by lightning strike.
The X-Files: Paper Clip (Part 3/3) Rewatch Season 3, Episode 2
Mulder and Scully are reunited. Mulder learns about the government's part in the alien hybrid project, and about his father's part in his sister's abduction.
The X-Files: The Blessing Way (Part 2/3) Rewatch Season 3, Episode 1
Mulder is nursed back to health by Albert Hosteen's tribe. Scully uncovers evidence that someone in the FBI is working with the conspiracy, and suspects Skinner.
The X-Files: Anasazi (Part 1/3) Rewatch Season 2, Episode 25
Mulder receives a tape containing encoded information about alien visitations, which leads him and Scully to New Mexico.
The X-Files: Our Town Rewatch Season 2, Episode 24
Mulder and Scully investigate the strange disappearance of a man in Dudley, Arkansas, a town that prides itself on its meat processing.
The X-Files: Soft Light Rewatch Season 2, Episode 23
A series of mysterious disappearances leads Mulder and Scully to a man whose shadow vaporizes people.
The X-Files: F. Emasculata Rewatch Season 2, Episode 22
After several men in a prison die of a mysterious illness, Scully tries to discover the cause while Mulder attempts to find two escapees who could potentially spread the disease.
The X-Files: The Calusari Rewatch Season 2, Episode 21
Mulder and Scully investigate the death of a two-year-old boy, who somehow escaped his safety harness and was lured onto an amusement park train track by a helium balloon.
The X-Files: Død Kalm Rewatch Season 2, Episode 19
Mulder and Scully go in seach of a US Navy vessel that has disappeared in the Norwegian Sea and just 18 members of its crew are found in a lifeboat, aged beyond all recognition.
The X-Files: Fearful Symmetry Rewatch Season 2, Episode 18
Mulder and Scully are called to Idaho after an unseen force leaves a trail of destruction: shattered windows, crushed cars, scattered road barricades, and a dead road construction worker.
The X-Files: End Game (part 2/2) Rewatch Season 2, Episode 17
The alien bounty hunter abducts Scully. Mulder learns that the clones from the previous episode were human-alien hybrids, part of an attempt to establish an alien colony on Earth — and that his apparently returned sister Samantha is another such clone.
The X-Files: Colony Rewatch Season 2, Episode 16
In part one of two-part episode, after three identical men are killed and their obituaries are emailed to Mulder, a mysterious CIA agent informs him and Scully that the killer is an alien bounty hunter sent to destroy the start of a colony of clones. Meanwhile, Mulder is distracted when his sister, Samantha, suddenly returns.
The X-Files: Fresh Bones Rewatch Season 2, Episode 15
Scully and Mulder are called to Folkstone, North Carolina, after a distraught Marine Corps private who has been experiencing hallucinatory episodes drives his car into a tree bearing a vévé, a drawn voodoo religious symbol.
The X-Files: Irresistible Rewatch Season 2, Episode 13
Mulder and Scully are called to Minneapolis to help out with the case of an opened grave and a desecrated body at the local cemetery.
The X-Files: Aubrey Rewatch Season 2, Episode 12
Mulder and Scully become involved in a murder investigation in Aubrey, Missouri, after a detective finds the remains of an FBI agent who disappeared in the 1940s, and can't explain how she knew to dig in one specific place in a large field late at night.
The X-Files: Excelsis Dei Rewatch Season 2, Episode 11
Scully and Mulder go to an elder care home in Worcester, Massachusetts, to investigate a nurse's report that she was sexually assaulted by an unseen force.
The X-Files: Red Museum Rewatch Season 2, Episode 10
Mulder and Scully are called to Delta Glen, Wisconsin, to look into the case of a teenaged boy who left his home in response to a phone call from an unknown person, saying he'd be gone for five minutes, and was found the next morning, wandering the woods in only his underwear, wild-eyed and incoherent with fear, and with the words, "He is one," written in black marker on his back.
The X-Files: Firewalker Rewatch Season 2, Episode 9
A volcanologist shows Mulder and Scully a video transmission from a volcano in Mount Avalon, New Hampshire, in which a dead seismologist and a moving shadow appears, and asks them to investigate the matter.
The X-Files: One Breath Rewatch Season 2, Episode 8
Scully reappears at a D.C. hospital, comatose and in critical condition. Mulder tries to find out what happened to her and who is responsible for it.
The X-Files: 3 Rewatch Season 2, Episode 7
With Scully still missing, Mulder goes to L.A. to investigate a series of murders in which the victim is drained of blood, the mirrors in the victim's house smashed, and biblical citations written on the walls in blood.
The X-Files: Ascension Rewatch Season 2, Episode 6
In the second installment of a two-part episode, Duane Barry heads off for an alien rendezvous with Scully in the trunk of his car, while Mulder puts the pieces together and figures out where he's gone.
The X-Files: Duane Barry Rewatch Season 2, Episode 5
In the first installment of a two-part episode, Mulder is called upon to handle a hostage negotiation with Duane Barry, former FBI agent, current psychiatric patient, and self-proclaimed multiple alien abductee.
The X-Files: Sleepless Rewatch Season 2, Episode 4
Mulder receives a marked copy of a newspaper and a cassette recording that point him to the case of a New York City sleep specialist who had called 911 to report a fire outside his apartment, only for the firefighters to find upon their arrival that there was neither a fire nor signs of a fire on the scene, just the doctor, dead and with a discharged fire extinguisher nearby. Mulder asks to be assigned to the case and finds himself working it in partnership with Agent Alex Krycek.
The X-Files: Blood Rewatch Season 2, Episode 3
Mulder is called to Franklin, Pennsylvania, an ordinarily peaceful agricultural district, which is suddenly experiencing a spate of normal, harmless people going on berserk murder sprees.
The X-Files: The Host Rewatch Season 2, Episode 2
Skinner relieves Mulder of his surveillance duty and sends him to Newark, New Jersey, to look into the matter of a Russian's body found dead in a sewer.
The X-Files: Little Green Men Rewatch Season 2, Episode 1
The X-Files have been closed, and Mulder reassigned to surveillance while Scully teaches at Quantico. Mulder is contacted by a senator, who sends him to check out a radio telescope station in Arecibo, Puerto Rico.
The X-Files: The Erlenmeyer Flask Rewatch Season 1, Episode 24
In the season one finale, Deep Throat calls Mulder to advise him to watch channel 8, which is broadcasting a news item about a man who managed to escape the police after first leading them on a car chase, and then being beaten with a nightstick, tasered, and shot.
The X-Files: Roland Rewatch Season 1, Episode 23
Scully and Mulder are called to the Mahan Washington Institute of Technology, in Colson, Washington, to investigate the death of a propulsion research scientist who had gotten locked into a wind tunnel with a turbine engine, both of which were then activated via the lab's computer, though there was no one else in the lab at the time but a janitor with an I.Q. of 70.
The X-Files: Born Again Rewatch Season 1, Episode 22
Mulder and Scully go to Buffalo to inquire into the case of a police detective who was thrown through a precinct interrogation room window at a time when there was no one else in the room but an eight-year-old girl.
The X-Files: Tooms Rewatch Season 1, Episode 21
In a sequel to the Squeeze episode, Tooms is paroled despite Mulder's objections, and Assistant Director Walter Skinner orders Scully to use more orthodox methods of investigation in her work on the X-Files.
The X-Files: Darkness Falls Rewatch Season 1, Episode 20
Mulder and Scully go to Olympia National Forest in Washington State to investigate the disappearance of an entire logging team and two federal Forest Service officials.
The X-Files: Shapes Rewatch Season 1, Episode 19
Mulder and Scully go to Montana to investigate the fatal shooting of a young Native American man by a white rancher, who swears he thought he was shooting at some sort of ferocious animal.
The X-Files: Miracle Man Rewatch Season 1, Episode 18
Scully and Mulder investigate a faith healing ministry in Tennessee after several unexplained sudden deaths occur among its attendants.
The X-Files: Young at Heart Rewatch Season 1, Episode 16
A killer whom Mulder helped capture and put in prison during his first assignment at the FBI, and who reportedly subsequently died in prison, suddenly reappears, and he is very much alive, on the loose, and out for revenge.
The X-Files: Lazarus Rewatch Season 1, Episode 15
When a bank robber named Warren James Dupre and an FBI agent named Jack Willis are both shot during Willis's and Scully's attempt to stop a bank robbery, only Willis survives, but he seems to be taking a less than professional approach towards finding Dupre's wife and partner in crime, Lula Philips.
The X-Files: Gender Bender Rewatch Season 1, Episode 14
A string of deaths of those who have just had sex with a gender changing stranger lead Mulder and Scully to Massachusetts, where they investigate a reclusive Amish-like sect known as the Kindred.
The X-Files: Fire Rewatch Season 1, Episode 12
Phoebe Green, an ex of Mulder's from his Oxford days, asks Mulder to look into a string of deaths by spontaneous combustion.
The X-Files: Eve Rewatch Season 1, Episode 11
Scully and Mulder look into the case of two men, one in Connecticut, one in California, who died in exactly the same way at exactly the same time, and who each left behind an eight-year-old daughter.
The X-Files: Fallen Angel Rewatch Season 1, Episode 10
Mulder and Scully investigate the government-quarantined site of a supposed toxic spill in Wisconsin.
The X-Files: Space Rewatch Season 1, Episode 9
Mulder and Scully are asked to come to Houston to look into technically inexplicable damage to a space shuttle that is on the verge of launching.
The X-Files: Ghost in the Machine Rewatch Season 1, Episode 7
A former colleague of Mulder's asks for his help with a case involving a CEO who was electrocuted in his tech company's computerized bathroom.
The X-Files: Shadows Rewatch Season 1, Episode 6
Scully and Mulder are called to Philadelphia to investigate the medically inexplicable deaths of two men who had attacked a young secretary at a bank machine, only to be found dead hours later with their throats crushed from the inside.
The X-Files: The Jersey Devil Rewatch Season 1, Episode 5
Scully and Mulder go to Atlantic City to investigate the case of a partially eaten body found in the nearby woods.
The X-Files: Conduit Rewatch Season 1, Episode 4
Scully and Mulder travel to Iowa to investigate the strange disappearance of a teenaged girl, and her 8-year-old brother's precocious code-writing ability.