* ActorAllusion: A photo of Hackman's character in ''Film/TheConversation'' is used for Brill's file. Critics such as KimNewman advanced the theory that the two characters are one and the same.
* HeyItsThatGuy: The NSA team includes Creator/JackBlack, Jamie Kennedy, Creator/SethGreen, the sniper from ''Film/SavingPrivateRyan'' (Barry Pepper), [[Film/StarshipTroopers Rico's squad mate]], [[Series/HawaiiFiveO Danno Williams]] and [[Film/HarryPotter Prof. Quirrell]], John Voight is married to [[Series/BreakingBad Skyler White]]. Also, Jason Robards (as the killed senator) and Tom Sizemore (as the mobster) are uncredited.
* HeyItsThatPlace: The law firm Dean works for is in the same building used as the headquarters in ''Series/{{JAG}}''.
* LifeImitatesArt: The current and ongoing controversies surrounding federally-endorsed NSA surveillance conducted on the greater American public certainly seem to echo the points addressed by the film.
* TechnologyMarchesOn: For a tech thriller, it's certainly strange in retrospect to see characters making such extensive use of ZIP discs.
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