The X-Files: Season 5, Episode 19

5 - 19: Folie a Deux

Mulder and Scully are instructed by Skinner to assess the threat at a telemarketing center in Illinois. A similar incident has happened before and this time a manifesto was sent to a Chicago radio station with claims of a paranormal nature at the center. Feeling that the case is a waste of time, Mulder tells Scully to stay behind while he plays the good Bureau kicking boy. However, Mulder soon realizes that the case is actually an X-File.