Horror History Horror Television Horror History: Sunday, May 10, 1998: “The X-Files” episode “Folie à Deux” premiered 4 Evil Eyes May 10, 1998 Season 5 Episode 19 A hostage-taker insists that his employer is a monster turning workers into zombies, and Mulder begins seeing evidence that others cannot. Source: JustWatch The X-Files (1993) Tags: horror Horror History The X-Files (1993) Folie à Deux Post navigation Previous Horror History: Sunday, May 3, 1998: “The X-Files” episode “The Pine Bluff Variant” premieredNext Horror History: Sunday, May 17, 1998: “The X-Files” episode “The End” premiered Related Stories Horror History: Monday, February 22, 2016: “The X-Files” episode “My Struggle II” premiered Horror History Horror Television Horror History: Monday, February 22, 2016: “The X-Files” episode “My Struggle II” premiered February 22, 2016 Horror History: Monday, February 15, 2016: “The X-Files” episode “Babylon” premiered Horror History Horror Television Horror History: Monday, February 15, 2016: “The X-Files” episode “Babylon” premiered February 15, 2016 Horror History: Monday, February 8, 2016: “The X-Files” episode “Home Again” premiered Television Horror History Horror Horror History: Monday, February 8, 2016: “The X-Files” episode “Home Again” premiered February 8, 2016