The original script was that Dupre's spirit jumps into Mulder's body but the studio argued against that, considering it too coincidental. Writer Howard Gordon later said that that was the right call.
The bank heist was shot in a real bank. Preparations for filming took twice as long as usual as it was the run-up to Christmas and the area was filled with Christmas shoppers. A lot of them dispersed rather quickly, however, when the filming actually took place and many mistook it for a real bank robbery, with most of them running away.
Here, it is revealed that Scully's birthday is February 23.
Callum Keith Rennie would reappear as a cemetery groundskeeper in Fresh Bones (1995) (which was about voodoo).
This is the first episode without David Duchovny and Gillian Anderson in every scene after the teaser, either together or separately.