* DoingItForTheArt: BruceWillis wasn't paid for the movie. His salary would have nearly doubled the film's budget, and he wanted to work with Gilliam badly enough that he opted for a cut of the box office receipts instead.
* EnforcedMethodActing: BradPitt's nervous and rapid speech was aided by Creator/TerryGilliam not letting him smoke during shooting.
* HeyItsThatGuy: The seemingly-unimportant lab worker whose circuitous plane trip will [[spoiler:unleash the apocalyptic virus]]: doesn't he look like the {{Jerkass}} cop who [[{{Determinator}} persistently oppresses]] [[Series/{{House}} Gregory House, MD]]? But... it ''couldn't'' be him; neither of those characters are like the [[WideEyedIdealist infinitely kind and patient]] hospital resident on that [[StElsewhere oddball medical series]] (yeah, a long time ago), which wound up being remembered for the increasingly-complex [[EpilepticTrees nutjob artifices]] inspired by its AllJustADream finale.
** Christopher Melloni is playing a cop, [[Series/LawAndOrderSpecialVictimsUnit again]]. With long hair for once.
** Done in universe by Dr. Railly, when she sees Cole in a photograph from WorldWarOne, which was the first step to convincing her that Cole may be from the future.
* HeyItsThatVoice: [[Radio/TheHitchhikersGuideToTheGalaxy Arthur Dent]] is a future scientist! I mean present. Which is still the future in real life.
** Who better to consult about time travel than a frequent customer of the Restaurant at the End of the Universe who spent a relaxing holiday in his own planet's Prehistory for a couple of years?
* PlayingAgainstType: Along with ''Film/{{Se7en}}'', one of the movies that helped Brad Pitt break out of pure pretty-boy type-casting. Also, Bruce Willis's character is notably more frail than what he usually plays. [[spoiler:This was the first movie where one of Bruce Willis' characters dies.]]
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