A former FBI Academy classmate of Scully's asks her for help on a case: Several murders have occurred where the victim's liver has been ripped out, yet there is no indication of an entry point to the place where the person had been murdered. Scully asks Mulder to assist them on the case and, despite his reputation in the Bureau, he agrees.

When an Arctic research team mysteriously begins to kill each other after drilling deeper into the ice than ever before, Mulder and Scully accompany a team of doctors and scientists to investigate the matter. They discover a new organism which can make the host become murderous by amplifying the host's feeling of anger and paranoia.

While investigating a kidnapping case, Scully and Mulder encounter a death row inmate Luther Lee Boggs, who claims to have psychic abilities. He informs the agents he will help solve the case if his sentence is reduced. Scully becomes an unwilling believer when Boggs tells her that she can communicate through him with her recently deceased father.

When a group of loggers in Olympic National Forest disappear in the same way that another group disappeared 60 years ago, Mulder, who has been watching the case and has requested the assignment, brings his partner to the remote wilderness of Washington State. Along with a forest ranger and a representative from the logging company, Mulder and Scully find the deserted logging base camp and a large cocoon that contains the desicated remains of a human being.

In a small western Pennsylvania town, several mild mannered residents suddenly go berserk. Mulder believes that it is more than coincidence when he investigates claims that the suspects receive written messages to kill in their digital displays of their household appliances.

Mulder and Scully are called in to investigate the unexplainable death of a retired escape artist in a town populated almost entirely by former circus and side-show acts. When more murders are committed, they find themselves racing against time.

In the course of tracking a serial killer preying upon fortune tellers, Mulder and Scully enlist the help of a man whom Mulder believes to have the ability to foresee how people will die. The psychic has visions of Mulder's death.

Mulder and Scully are challenged by a man who seems to have the ability to control others. He leaves clues for Mulder and Scully to follow as he sets up his contest of wills.

When a couple claims to have been abducted by aliens, Mulder and Scully try to find out the truth, but it turns out to be impossible task since everyone has a different version of the story.

When Mulder finds the body of a little girl, which re-opens one of his old cases in the Violent Crimes Unit, he believes that the serial killer whom he captured may have murdered more victims and one of them might be his sister.

Mulder and Scully involve themselves in an apparant murder case at the Massachusetts Institute of Technology when the murderer's alibi proves to be out there: He claims that an old man had foretold the victim's death. However, the case becomes interesting when the campus security officer who detained the old man is found dead... and frozen solid.

When several babies in the same town are all born with tails, the local OB-GYN is blamed for tampering with fertilized eggs. Mulder suspects a man who proves to be impossible to identify.

On their way to a FBI convention in Florida, Mulder and Scully involve themselves in a case where three men have mysteriously vanished in a large forest. Evidence at the crime scene seems to suggest someone human who walks on the balls of their feet.

Mulder and Scully head to a small Midwestern town to investigate reports of a two-faced monster that has been impregnating women.

Having to give a report to Assistant Director Skinner on their latest case, Mulder and Scully both give each other their interpretation of the events that led to Mulder killing a man who he suspected was a vampire.

While working on a domestic terrorism assignment, Mulder comes across an apparant hostage situation turned high-speed chase in Northern Nevada that seemingly defies belief: A woman's head explodes in a police car, yet there is no indication she was shot. Defying orders not to pursue cases resembling X-Files, Mulder and Scully head to Elko, Nevada, to assist the local police.

With the rain falling at sea, Mulder is pulled aboard HMS Queen Anne, long thought to have disappeared in the Bermuda Triangle. However, the crew that pulls him up are from the year that the ship had disappeared: 1939. While Mulder tries to figure out what to do, the Lone Gunmen approach Scully while at work and ask her for help in finding Mulder.

Mulder and Scully journey to a small town that is plagued by drought. The town's mayor, who has invited them, tells the agents that the blight is caused by a local man who, he claims, does rain dances for money.

A woman is forced to relive the same day over and over as she tries to prevent Mulder and Scully from being killed by her boyfriend during a bank robbery attempt. As the events restart again and again, Mulder's sense of Deja-vu grows stronger.

Mulder and Scully find an old case involving a star player in the Negro Baseball League who has an unbelievable batting average and an incredible secret.