"Oubliette" is the eighth episode of the third season of the American science fiction television series The X-Files, and originally aired on the Fox network on November 17, 1995. Written by Charles Grant Craig and directed by Kim Manners, "Oubliette" is a "monster of the week" story, unconnected to the series' wider mythology. It earned a Nielsen rating of 10.5 and was watched by 15.90 million people on its initial broadcast. The episode received positive reviews. Both the emotional nature of the story and David Duchovny's performance received positive critical attention.

The show centers on FBI special agents Fox Mulder (Duchovny) and Dana Scully (Gillian Anderson) who work on cases linked to the paranormal, called X-Files. Mulder is a believer in the paranormal, while the skeptical Scully has been assigned to debunk his work. In the installment, a teenager named Amy is kidnapped and imprisoned by a mentally unstable photographer. Mulder discovers a psychic connection between the recently kidnapped victim and Lucy, another girl kidnapped by the same man years ago. He attempts to use the connection to help solve the investigation, but discovers that the event may be too traumatic for Lucy to handle.

"Oubliette" is the only X-Files screenplay written by Craig, who exited the writing staff before the entry was produced. The extensive outdoor filming led to several difficulties for the production crew. Amy was 12 years old in the original screenplay. The Fox network was concerned her situation was an uncomfortable parallel to the recent Polly Klaas case, resulting in her age being increased before filming could begin. Critics have complimented the thematic resonance of the kidnapping and its effect on Mulder.