When John Finn finished his lengthy monologue about military secrets and faked UFO sightings, he received a round of applause from the cast and crew.
With 27 million viewers, this is the second most watched episode of the show.
This is the first X-Files episode presented in widescreen format.
Unusual Suspects (1997), the third episode in this fifth season, was actually filmed before this one. David Duchovny and Gillian Anderson were still shooting scenes for The X Files (1998) at the time.
The room filled with alien bodies that Mulder discovers actually only contained 20 effigies. The rest were added in via computer effects.