The adaptation of Philip K. Dick's short story "The Impostor" was originally planned to be one segment (about forty minutes) of a three-part science fiction movie. The production company liked the early "dailies" so much, that the idea was fleshed out into a feature-length film. The other segments grew into the features Mimic (1997) and Alien Love Triangle (2008).
In the opening scene of the movie, footage of soldiers is taken from the 1997 film Starship Troopers (1997); and footage of a crater, with other explosions is taken from the film Armageddon.
A street scene is filmed in a courtyard of Cal Poly Pomona's administration building, the same one used for Jude Law's apartment building in Gattaca (1997). Several students and staff of Cal Poly Pomona were used as extras for this scene.