1. Pilot  

First aired: 9/10/1993    Production Code: 1X79

Special Agent Dana Scully is partnered with Special Agent Fox Mulder to validate his work on a special project called The X-Files. While he is a believer in the paranormal, fuelled by a lost memory where his sister was abducted by aliens; she is a scientist and prefers to look for rational, logical explanations. Their first case takes them to Oregon, to investigate the unsolved deaths of several high school classmates, which Mulder believes are linked to an alien abduction.

2. Deep Throat  

First aired: 9/17/1993    Production Code: 1X01

Mulder and Scully head to Ellens Air Force Base to investigate the mysterious case of a military test pilot who disappeared after experiencing strange psychotic behavior. While on the case, Mulder meets a mysterious man dubbed 'Deep Throat', who claims to have classified information about his investigations into the paranormal.

3. Squeeze  

First aired: 9/24/1993    Production Code: 1X02

One of Scully's friends from the FBI academy, now working in the Violent Crimes Unit, asks her to assist him on a homicide investigation involving no clear point of entry. Mulder realizes that this is similar to a series of X-Files case that have occurred every thirty years, and joins in the investigation to stop the latest cycle.

4. Conduit  

First aired: 10/1/1993    Production Code: 1X03

As Section Chief Blevins expresses his concern with the direction of the X-Files department, Mulder becomes obsessed with solving a case that closely parallels an 'encounter' he experienced as a child... the abduction of his kid sister, Samantha.

5. The Jersey Devil  

First aired: 10/8/1993    Production Code: 1X04

Mulder's trip to Atlantic City doesn't take him to the glittering casinos or luxury hotels. Instead, he plays a dangerous game of hunter-and-hunted with the maneater that haunts the back alleys and woods surrounding the city. However, it's not long before even Scully, the eternal skeptic, is lured back by the mounting evidence Mulder manages to drag out of tourist-wary local law enforcement agencies.

6. Shadows  

First aired: 10/22/1993    Production Code: 1X05

When an unseen force commits several murders where a young woman is present, Mulder suspects that it is the spirit of the woman's former boss protecting her, while Scully believes the boss merely faked his own death.

7. Ghost in the Machine  

First aired: 10/29/1993    Production Code: 1X06

A new intelligence gropes its way to life in the depths of wires and circuit boards - only to find itself perched on the edge of immediate extinction. When it fights back, killing Mulder's former partner in the process, he and Scully must find a way past its considerable defences.

8. Ice  

First aired: 11/5/1993    Production Code: 1X07

When an Arctic research team mysteriously kills each other and themselves only days after drilling deeper into the ice than ever before, Mulder and Scully accompany a team of doctors and scientists to investigate. They discover an organism which infects living creatures and amplifies the host's feeling of anger and paranoia, and the new team starts to deteriorate as they wonder who among them are killers.

9. Space  

First aired: 11/12/1993    Production Code: 1X08

Mulder and Scully are contacted by a communications specialist from NASA who shows them evidence of sabotage in the space programme. Mulder's youthful hero-worship is shaken by the apparent involvement of a high-ranking astronaut.

10. Fallen Angel  

First aired: 11/19/1993    Production Code: 1X09

When a tract of lonely woodland is cordoned off between laser fences, and rapidly changing explanations are rampant, Mulder's curiosity carries him beyond the bounds of official jurisdiction-and into the middle of a UFO cleanup. Scully's attempts to protect Mulder from himself are only marginally successful, and neither agents seem capable of protecting the one innocent on the scene- Max Fenig.

11. Eve  

First aired: 12/10/1993    Production Code: 1X10

When two fathers on opposite sides of the country are unexplainably murdered at the exact same time in the exact same way, Mulder and Scully are called in to investigate. When they discover that both of the fathers eight-year-old daughters are identical twins, they realize that something even stranger is going on.

12. Fire  

First aired: 12/17/1993    Production Code: 1X11

When an old Oxford girlfriend of Mulder's asks for his help in an international case concerning the unexplainable execution of several British dignitaries they encounter an assassin who can produce fire from his bare hands.

13. Beyond the Sea  

First aired: 1/7/1994    Production Code: 1X12

Scully has a brush with the paranormal when her recently deceased father appears to her in a vision. Meanwhile, Mulder becomes a skeptic when a death row inmate he helped send to prison claims to be a psychic and offers to lead the agents to a serial killer.

14. Genderbender  

First aired: 1/21/1994    Production Code: 1X13

Mulder and Scully investigate a series of murders where the suspect seems to be both male and female. Their investigation leads them to the small town of Stevenston, Massachusetts, where a group called the Kindred have set up a village back in the woods.

15. Lazarus  

First aired: 2/4/1994    Production Code: 1X14

When FBI Agent Jack Willis is shot during a bank robbery, Agent Scully takes drastic steps to resuscitate him while the bank robber, Warren Dupre dies on the operating table. Afterward, Agent Willis begins to exhibit behavior strangely reminiscent of Dupre.

16. Young at Heart  

First aired: 2/11/1994    Production Code: 1X15

Mulder becomes the target of someone from his past, John Barnett, a jewelry store robber with an itchy trigger finger that Mulder sent to prison when he first joined the Bureau. The only problem is that Barnett died four years ago.

17. E.B.E.  

First aired: 2/18/1994    Production Code: 1X16

A dramatic increase in UFO sightings and a bizarre attack on a transport truck convince Mulder that he's on the trail of a live alien being covertly transported cross-country. For her part, Scully, equally wary of the involvement of the Lone Gunmen as she is of Deep Throat, suspects a rather more earthly explanation.

18. Miracle Man  

First aired: 3/18/1994    Production Code: 1X17

A rash of deaths under the Miracle Ministry's traveling tent brings Scully and Mulder into the realm of miracles and shysters. When Samuel, reputed raiser of the dead and healer of the sick, indicates he has some knowledge of Mulder's long lost sister, Scully's convinced the young man is setting them up. Mulder isn't so sure.

19. Shapes  

First aired: 4/1/1994    Production Code: 1X18

Mulder and Scully travel to an American Indian reservation to investigate the death of an Indian man who was mistaken for a wild animal and may have been the legendary Manitou, a man who can shapeshift into a beast.

20. Darkness Falls  

First aired: 4/15/1994    Production Code: 1X19

When a group of loggers in the Washington State National Forest disappear in the same way that another group disappeared 50 years ago, Mulder and Scully go along to investigate and find themselves trapped in a cabin surrounded by flesh eating insects that only attack at night.

21. Tooms  

First aired: 4/22/1994    Production Code: 1X20

Eugene Tooms, the genetic mutant, is released from the sanitarium and Mulder becomes personally involved to ensure that he is caught in the act of getting the last human liver he needs to go into hibernation for another 30 years.

22. Born Again  

First aired: 4/29/1994    Production Code: 1X21

After a detective and his former partner die in unexplained circumstances, the accidents are linked to a little girl who witnessed both deaths and Mulder believes that she may be the reincarnation of a policeman murdered by his colleagues.

23. Roland  

First aired: 5/6/1994    Production Code: 1X22

When a series of murders occur among a group of scientists working on advanced propulsion technology, Mulder and Scully are called in to investigate. All evidence seems to point to the janitor Roland, who is mentally handicapped.

24. The Erlenmeyer Flask  

First aired: 5/13/1994    Production Code: 1X23

When Deep Throat points out a news story about a fugitive who apparently drowned, Mulder and Scully cannot see what makes the case special but they follow it up anyway. With Deep Throat's insistence, they discover evidence of secret government project code-named Purity Control, which uses human test subjects and infects them with extraterrestrial DNA. However, the evidence and everyone who has seen it is quickly being eliminated.