 The scene in which Scully encounters an alien forcefield was created with the use of a special effects harness.Effects producer Bill Millar created many of the special effects for the episode—including shots of the alien craft as well as its interaction with people—in a building in Big Bear.The episode contains a shot of Detective Miles morphing into the alien bounty hunter, which required various shots of Leon Russom and Brian Thompson to be spliced together via blue screen technology.