Trivia: When the credits have finished rolling there is a garbled radio transmission of what sounds like Rob saying "Help us." But when played in reverse you can clearly hear him saying "It's still alive."
Trivia: The bees in the dome scene are real (there were about 30,000 of them). David Duchovny and Gillian Anderson were actually in the dome with them, and neither of them wore protective gear, but weren't stung nonetheless.
Trivia: The photo of Nicky in her confidential file is actually a promotional shot taken of Julia Stiles (Nicky) in 1999 for her movie "10 Things I Hate About You."
Trivia: Kevin Spacey made sure that it was in his contract that his name would not appear in any press releases or reviews, that his photo would never appear in any of the above, he was not to be mentioned in interviews nor was his name to be anywhere in the opening credits. He cites his reason as being that The Usual Suspects and Outbreak were both opening earlier that same year and figured that people would start to recognize his name. And he also figured that if people saw his name in connection with the movie and he didn't appear for the first 2/3 of the movie they would know that he was playing the killer, thus ruining the element of shock and surprise that the moment in the movie has built up to. To compensate, Spacey is listed first in the ending credits.
Trivia: Christopher Walken doesn't speak a single word in the entire course of the movie.
Trivia: Kevin Spacey had to record the scene where Prot eats a whole banana (skin and all) 27 times.
Trivia: When the audience first meets Mike Church, he's sitting in his car, which is parked on the wrong side of the street. While most people believe this is because Kenneth Branagh is from the United Kingdom (where they drive on the opposite side of the road), it is actually because behind him are a number of skyscrapers that he, as the director, wanted included in the background.
Trivia: The film is edited by Kevin Greutert, who edited "Saw" 1-5, and directed the sixth and seventh films. Greutert is one of only a few holdover crewmembers from the original run of the series to return. He said he felt an obligation to be a part of "Jigsaw"- feeling that given his past with the series, he should help usher the franchise into the new direction that the producers and writers wanted to take, while also helping to maintain ties to what came before.
Trivia: K Callan, who plays Christopher Plummer's mother in this film, is actually six years younger than Plummer in real life.
Trivia: When Roy McBride is reviewing a top-secret message regarding his father and the LIMA mission, the message filename is "6EQUJ5," which is a very obscure easter egg in the movie. The filename 6EQUJ5 refers to the real-life "WOW Signal," a deep space radio signal received by the Big Ear radio telescope at Ohio State University in 1977. The alpha-numeric designation "6EQUJ5" was a printed readout of the signal's duration and intensity. This signal lasted 72 seconds and was 20 times stronger than background radio noise, causing a surprised astronomer to circle the printed 6EQUJ5 readout in red ink and make the handwritten notation "WOW!" in the margin. While the signal was an anomalous one-time event that was never repeated, and there is still no proof that 6EQUJ5 was alien in origin, it has stimulated debate about extraterrestrial radio signals for decades. Ironically, the movie "Ad Astra" concludes that there are no alien radio signals and that we really are alone in the universe.
Trivia: Probably the most impressive visual effect in this film is when Corso consults the twin brothers Pablo and Pedro Ceniza (rare book experts). Both Ceniza twins were played by actor José López Rodero in the subtle and entirely convincing digital effect sequence. The only flaw was that the elderly twins had identical facial wrinkles, which never happens with real-life twins. Beyond that, José López Rodero additionally played the two nameless workmen that Corso encounters at the end of the film, meaning that Rodero played four digital-effect roles in this movie.
Trivia: While filming the movie "Dumb And Dumber Too", Jim Carrey admitted to Jeff Daniels that he hated making this movie because he found it an offensive depiction of the native people, and he never understood why Ace, who was a lover of all animals, was afraid of bats. Jim Carrey even suggested that instead of Ace being afraid of bats, that he should be allergic to them.
Trivia: Philip Seymour Hoffman was the only actor who knew whether or not Father Flynn was actually guilty.
Trivia: The family of late author Roald Dahl who wrote the novel The Witches gave director Robert Zemeckis permission to do a remake on the condition that the ending of the movie follow the ending of the book, where the boy remains a mouse.
Trivia: The directorial debut of series co-star Patrick Wilson.