"Unruhe" is the fourth episode of the fourth season of the American science fiction television series The X-Files. It originally aired on the Fox network in the United States on October 27, 1996, and was the first episode to air on Sunday night when the show was moved from Fridays to Sundays. "Unruhe" was written by Vince Gilligan, directed by Rob Bowman, and featured a guest appearance from Pruitt Taylor Vince. The episode is a "Monster-of-the-Week" story, unconnected to the series' wider mythology. "Unruhe" earned a Nielsen rating of 11.7, being watched by 19.10 million people upon its initial broadcast.

The show centers on FBI special agents Fox Mulder (David Duchovny) and Dana Scully (Gillian Anderson) who work on cases linked to the paranormal, called X-Files. In this episode, Mulder and Scully investigate a man who kidnaps women and lobotomizes them. The agents' only clues to catching him are distorted photos of the victims taken just before their kidnapping.

Gilligan wrote the episode after being inspired by stories of serial killers he read as a child. Other inspirations include the concept of thought-photographs, and common fears associated with dentist chairs. The episode received a generally positive reception, though critics criticized the plotline featuring Scully being kidnapped. Critical attention also expressed a positive opinion of how scary the episode was in nature. Guest actor Taylor Vince received positive reviews as the episode's antagonist.