Favorite X-Files Episode

An alien abduction of two teenagers with different versions of the same facts prompts a science-fiction novelist to write a book about the incident. However no one involved with the investigation can tell him the full story with any accuracy.

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.

Assistant Director Skinner and Scully are at a standoff when Mulder bursts in and discovers that Skinner has the digital tape. Reunited, Mulder and Scully travel to a secret vault inside a mine and find an elaborate filing system of medical records which reveals that Mulder's sister may not have been the first choice for abduction. Meanwhile, Skinner deals with the Cigarette-Smoking Man for their safety.

Five babies in the same town are all born with tails and the local OB-GYN is blamed for tampering with fertilised eggs. However, Mulder discovers the culprit to be a simple man with a genetic deformity who may have the ability to alter his appearance.

Cigarette Smoking Man helps Mulder to obtain Scully's cure and also lets him see his real sister who doesn't turn out to be as happy to see Mulder as he would've liked. In return for this, CSM asks that Mulder quit the FBI and work for him in the Syndicate where he could have power and respect which Mulder turns down, deciding to stay on the side of justice. While Scully's cure appears to have worked, CSM faces his own enemies and disappears, presumed dead.

In the midst of a psychic sideshow while on a murder case, Mulder and Scully enlist the help of a man who may have a true psychic ability to foresee how people will die to help the agents catch a man killing fortune tellers.

Mulder obtains what could be the original and uncut MJ documents containing information about the government's knowledge of extraterrestrial life, which could lead him closer to the truth than ever before. But Mulder's enemies make sure he learns that there's a heavy price to pay for his much sought after truth.

After Mulder chases down and kills a young man whom he believes to be a vampire, Scully realizes that his fangs are fake. The agents then return to DC, aware of the mistake they just made. Faced with a lawsuit from the family of the man, they recount each of their sides to the story leading up to the event.