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!!Film
* ActorAllusion: Brynner wears the same outfit from ''Film/TheMagnificentSeven''.
* DeletedScene: There is a scene added for TV where a guest in Medieval World is tortured on the rack after the robots go haywire.
* RecycledINSPACE: 15 years later, Michael Crichton would write his most famous story, ''Literature/JurassicPark'', which is also about an amusement park where the attractions go crazy and attack the guests (only this time they were cloned dinosaurs, not robots).
* TechnologyMarchesOn: The sheer number of reel-to-reel computers running the resort are one obvious case. Another is that the spreading malfunction of the Delos robots is described in terms of an infection, which the heads of Delos laugh off -- keep in mind that this came out two years after what is commonly described as the first computer virus, and almost a decade before the first time one infected anything outside of the lab where it was created.
** On top of that, in 1973, the Gunslinger's POVCam sequences were ''the most advanced special effect in recorded history'', the first use of digital image processing in a feature.
* WhatCouldHaveBeen: Quentin Tarantino was offered the chance to helm a remake of the film in the early 2000s but declined, and the film eventually got lost in DevelopmentHell.


!!Series
* ActingInTheDark:
** [[spoiler:Jeffrey Wright]] was one of the few actors who knew [[spoiler:Bernard]] is a host, and even he was only told after the pilot was filmed, to allow him to put some subtle quirks in his body language.
** Defied by [[http://www.ew.com/article/2016/12/05/westworld-anthony-hopkins-finale Anthony Hopkins]], who specifically demanded to be given the full picture as a condition after he was initially sent scripts with a lot of blacked out lines.
* ActingForTwo: [[spoiler:Jeffrey Wright plays Bernard Lowe and Arnold Weber (the man whose likeness that Bernard's is based on).]]
* TheCameo: The photo [[spoiler: which turns out to be of Logan's sister and William's fiancee Juliet]] which drives Peter Abernathy to his decommissioning is just [[http://comicbook.com/popculturenow/2016/12/04/westworld-williams-wife-has-been-found/ a mirrored stock photo]] of ''Series/AmericasNextTopModel'' contestant Claire Unabia.
* CastingGag: In the park's storylines, Teddy is "the one to lose" to make winning Dolores have more meaning. His actor Creator/JamesMarsden is known for playing the RomanticFalseLead in various works; his characters also [[ChronicallyKilledActor tend to die a lot]], as it turns out.
** Shannon Woodward was a regular guest on ''TheThrillingAdventureHour'', most often as recurring character The Widow Johnson in "Sparks Nevada: Marshal on Mars". This segment of the show, set on Mars in the future, is both intimately acquainted with sci-fi cowboys and artificial intelligence...
** Steven Ogg's Rebus is a deranged psychopath who is also intended to act as an EvilMentor to more crime-inclined guests. Just like [[VideoGame/GrandTheftAutoV Trevor.]]
* TheCharacterDiedWithHim: Indicated to be so with Kissy, since Eddie Rouse [[http://www.greensboro.com/go_triad/film_tv/tv-tidbits-westworld-premiere-includes-final-performance-by-eddie-rouse/article_b3adb137-79e2-5a9c-a490-9480a2ff898e.html passed away in December 2014]], a few months after filming the pilot. A dedication to him appears in the pilot episode's end credits.
* DoingItForTheArt: Much like the movies by [[Creator/ChristopherNolan Christopher]] & Creator/JonathanNolan, the show is shot on 35mm filmstock, making it one of the few which still do so. Plus, the show uses a lot of Main/PracticalEffects for several key sequences, with CGI being used only to embellish certain things which aren't physically possible.
* ExactWords: When [[http://screenrant.com/westworld-samurai-world/ asked about the subject]] when the show first premiered, Jonathan Nolan said that Roman World and Medieval World would not be appearing on the show. [[spoiler:Since he was never asked anything about any ''other'' theme parks, he and Lisa Joy must have seen that as a chance to reveal in the season one finale that Delos also operates what seems to be a JidaiGeki-themed park, which fans have taken to calling "Samurai World".]]
* FakeAmerican: Australians Luke Hemsworth (Stubbs) and Leonardo Nam (Felix) and the British Ben Barnes (Logan).
** OohMeAccentsSlipping: Felix sometimes lapses into his actor's native Australian accent for the briefest of moments.
* FakeNationality: Armistice is played by Norwegian actress Ingrid Bolsø Berdal.
* FanNickname: Several, but especially [[spoiler:"Bernarnold"]] for Jeffrey Wright's character and various iterations of "Dolores" (Delores, Dorito, etc.) since [[SpellMyNameWithAnS no one seems to know how to spell her name correctly]].
* IKnewIt:
** Many people guessed that [[spoiler:Bernard was a host]] before it actually was revealed in the seventh episode.
** Likewise, many people figured out that [[spoiler:the show's narrative is set between two time periods]] before it was revealed in the ninth episode. Related to this, many people also guessed that [[spoiler:William is the past version of the Man in Black]], which is strongly implied by the end of the episode and confirmed in the season one finale.
* NamesTheSame: Elsie Hughes. Elsie is the seldom-used first name of Mrs. Hughes in ''Series/DowntonAbbey''.
* TheOtherMarty: Miranda Otto was first cast to play Theresa, but dropped out during the first season's TroubledProduction.
* ProductionPosse: Several of the crew members are people who've worked with the Nolan brothers on their former projects.
** From ''Series/PersonOfInterest'': directors Richard J. Lewis, Fred Toye, & Stephen Williams; actors Jimmi Simpson, Robert Mukes, & Steven Ogg; writer Dan Dietz, composer Ramin Djawadi, editor Stephen Semel, & visual effects supervisor Jay Worth (as well as VFX studios Co SA & ILP).
** From ''Film/ThePrestige'', ''Film/{{Interstellar}}'', ''Film/{{Inception}}'', & ''Franchise/TheDarkKnightTrilogy'': production designer Nathan Crowley, set decorator Julie Ochipinti, casting director John Papsidera, actors Lena Georgas, Wade Williams, & Talulah Riley, & VFX studio Double Negative.
* RealitySubtext: Most of Evan Rachel Wood's career before this show was spent in DamselInDistress roles. She's said that playing someone programmed as yet another of those only to send her story OffTheRails to become an ActionGirl was very cathartic, and added a good deal to her performance as she actually felt like she was fighting her instincts.
* ScheduleSlip: Shortly after the first season ended, the producers admitted that given their busy film careers, we wouldn't be seeing Season 2 until at least two years later.
* TimeShiftedActor: [[spoiler: Jimmi Simpson plays the younger version of Creator/EdHarris's character.]]
* WhatCouldHaveBeen:
** Creator/EionBailey was originally cast as Logan but had to drop out, and was replaced with Ben Barnes.
** Actress Miranda Otto had to leave after filming the pilot due to commitments to ''{{Series/Homeland}}'', and so she was replaced by and her scenes refilmed with Sidse Babett Knudsen.
** Creator/GeorgeRRMartin is a big fan of the series - to the point where he [[http://www.vanityfair.com/hollywood/2016/10/westworld-game-of-thrones-crossover-george-rr-martin offered]] the producers a ''{{crossover}}'', with Westeros acting as the original film's "Medieval World", filled with ''Series/GameOfThrones'' cameos. Amusingly, the producers' explanation for why they didn't take him up on it is adorably respectful; they didn't want to imply that ''Literature/ASongOfIceAndFire'' was just a theme park.
-->'''Jonathan Nolan''': We love George. Heís a lovely guy and a stunning writer, and itís flattering he would encourage a crossover. We should be so lucky.\\
'''Lisa Joy''': I need to be believe that dragons are real. I want them be a real thing. So as much as I love George, I canít lose that for myself!
** According to Nolan, there was a long arc envisioned involving Kissy, but it was scrapped when Rouse died after filming the pilot.
** Per the [[http://www.empireonline.com/movies/features/westworld-exclusive-inside-look-season-two-preview/ showrunners]], while initially planning out the series, [[spoiler: Ford was supposed to die ''at the end of the pilot''. Once they started outlining the episode, they realized the magnitude of the character, & decided to keep him on longer, before killing him in the first season finale. Not exactly a case of DeadStarWalking, as Creator/AnthonyHopkins hadn't been cast in the role at the time.]]
* WordOfGod:
** Jonathan Nolan has stated that Romanworld and Medievalworld will not be appearing in the series. [[spoiler:He never said anything about Samuraiworld, though.]]
** Several months after the first season ended, the producers saw numerous people had been theorizing that [[spoiler:Maeve staying in the park was just her programming kicking back in, and specified that it was her own choice to find her daughter.]]
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