David Duchovny in The X-Files (1993) Folie a Deux
S5E19
Mulder and Scully are sent to Chicago after after a telemarketing firm receives anonymous threats. The company is particularly concerned as they had an employee go postal in a different office and wants to avoid another dangerous incident. One of the company's employees, Gary Lambert, is convinced that his boss Greg Pincus is literally a monster who no one else can see for what he really is. Lambert takes everyone, including Mulder, hostage but during the incident Mulder realizes that Lambert may not be the deranged madman everyone is making him out to be.
*Folie a Deux (1998) was originally going to be the final "monster of the week" episode of the series. Creator Chris Carter wanted the series to end after the Season 5 mythology episode The End (1998), and move into feature films only instead. Ultimately that plan was scrapped when Fox deemed the series too profitable to end after only five seasons.














