The Sim-Pal slogan is "A Sim-Pal that's fun to be with!", a derivation from "The Hitchhiker's Guide to the Galaxy" series by Douglas Adams. There, the corporation that created robots with "Genuine People Personalities", had the slogan "Your plastic pal that's fun to be with!"
The part of the holographic girl was overdubbed by the receptionist of Vine St. Studios, at which post-production was taking place. Victoria DeFrancesco Soto, an American SAG/AFTRA actress and voice-over artist, states she was asked to do this when the original actor could not be found in time.
During the climax of the film, a helicopter is seen to tilt forward while in flight in order to use its rotor blades as weapons. The same thing happened in Director Roger Spottiswoode's previous movie Tomorrow Never Dies (1997).
Set in 2015, but released in 2000, the only accurate future technologies predicted (excluding cloning) were flatscreen televisions and self-driving vehicles (though as of 2017, they're still in the prototype phase).
Many of the supporting cast went on to become bigger stars, including Terry Crews, Tony Goldwyn (of Scandel (2012)), and Michael Rooker (who appeared in Guardians of the Galaxy (2014), Guardians of the Galaxy Vol. 2 (2017), and The Walking Dead (2010)).
When Adam Gibson (Arnold Schwarzenegger) is spotted by his daughter outside, he offers to take her back to bed. She asks to be carried "fireman". Schwarzenegger played firefighter Gordon Brewer in Collateral Damage (2002).
The trivia items below may give away important plot points.
As a joke, and due to the fact that he plays two versions of the same character in the film, Arnold Schwarzenegger received nominations at the 21st Annual Razzie Awards in both the leading and supporting categories, but the nominations are technically incorrect. He was nominated for Worst Actor as the real Adam Gibson and Worst Supporting Actor as the clone of Adam Gibson. In fact, the clone is who most of the movie follows, and the real Adam Gibson is the supporting character.
Although Tripp (Colin Cunningham) (the assassin that killed Drucker, and others) claims to have "people on the inside", and states this as the reason Adam (Arnold Schwarzenegger) must shoot him in the head (to protect their identities), no "inside people" are ever revealed.
The Coliseum-like building that houses the genetic lab, and is blown up at the end, is actually the Vancouver Public Library, making it an inside joke amongst the citizens of Vancouver, British Columbia.
The film had been considered to be a remake or updated version of Total Recall (1990). The film does bare similarities. Both films open with the main protagonists Douglas Quaid and Adam Gibson at home in the bedrooms with their wives, which the scene ends with them engaging in sexual activity. In both films both Douglas Quaid and Adam Gibson watches TV adverts about Rekall and RePet. Both Douglas Quaid and Adam Gibson get discouraged from going to ReKall and RePet. When they go to ReKall and RePet, Both Douglas Quaid and RePet questions the salesmen on what they do are ReKall and RePet and if it's safe. Both Douglas Quaid and Adam Gibson wake up in Taxi cabs. When both Douglas Quaid and Adam Gibson come home from ReKall and RePet, they get chased by assassins whom are trying to kill them. Both Douglas Quaid and Adam Gibson learn they have identical doubles. In both films, both Douglas Quaid and Adam Gibson encounter fundamentalists that opposes the main antagonists and tells them to face the truth and fight back against the main antagonists. When they are brought before the main antagonists, both Douglas Quaid and Adam Gibson discover the truth about themselves and that they are not who they really are. In both movies, Rekall and RePet implant memories into people's minds and in both films, both Douglas Quaid and Adam Gibson uses doubles of themselves to deceive the main antagonists and their henchmen in the final confrontations.