Westworld (1973) Poster



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Director John Carpenter based the "indestructable" nature of his killer Michael Myers in Halloween (1978) on Yul Brynner's character in this film. Similarly, Arnold Schwarzenegger used Brynner's performance as the basis of his performance in The Terminator (1984).
The first use of computer digitized images as part of a feature film (not merely monitor graphics) was the Gunslinger's point of view in Westworld. After the process was finally developed enough to produce satisfactory results, it took a mere eight hours to produce each ten seconds of Gunslinger's pixellated POV.
The robot that Yul Brynner portrays is an homage/spoof of his character Chris from The Magnificent Seven (1960) and wears the same costume.
Michael Crichton became inspired to write this film after a trip to Disneyland, where he saw the Pirates of the Caribbean ride, and was impressed by the animatronic characters. Furthermore, the ride is mentioned is Jurassic Park (1993), when Malcolm says the "Pirates didn't come to life and kill people", unlike what happens in this film. Jurassic Park (1993) was based on the novel by Westworld director Michael Crichton.
When breakdowns of the robots begin to occur and spread, there is a discussion on the similarity of this problem to a disease. This is a very early reference to computer viruses.
The film takes place in 1983.
Since the movie takes place in 1983, the amusement park cost of $1,000 per day would cost $2,423 today (Oct 2016).
There were several minor injures during filming. During a shootout scene a piece of wadding from a blank cartridge struck Yul Brynner in the eye, scratching his cornea and leaving him unable to wear his light reflecting contacts without his injured eye turning red and tearing up, so shooting had to be maneuvered to allow time for his eye to heal. And during the scene where James Brolin's character was bitten by a rattlesnake, while the milked rattler was attached to Brolin's arm, he was bitten by the teeth on the snakes lower jaw, despite wearing padding on his arm made of leather and cotton.
The western set for Westworld was used in Blazing Saddles (1974).
Michael Crichton would later use the similar plot line about an amusement park that goes horribly wrong and the attractions malfunctioning for his novel "Jurassic Park", which would become the hit film Jurassic Park (1993) 20 years later.
Yul Brynner's character is known as The Gunslinger. Interestingly, the word "gunslinger" was only created in the 1950s and has no connection to the old West.
Inspiration for The Simpsons, episode The Simpsons: Itchy & Scratchy Land (1994).
After the filming of Terminator 3: Rise of the Machines (2003), Arnold Schwarzenegger was to produce and star in a remake of Westworld for Warner Bros. After that, he was meant to star in a sequel to Conan the Barbarian (1982), pairing him with a younger swordsman. Both these plans never came to fruition after Schwarzenegger was elected Governor of California in 2003.
This film inspired the scene where Principal Skinner chases Bart Simpson in the episode The Simpsons: The Boy Who Knew Too Much (1994).
Allen Oppenheimer that was the head technician went on to be Dr Rudy Wells from 1974 to 1975 in The Six Million Dollar Man
According to tvguide.com, and the closing credits the gardens of movie comedian Harold Lloyd's estate were used for some of the amusement park sequences.


The trivia items below may give away important plot points.

When the Gunslinger robot is splashed in the face with acid, Yul Brynner's face was coated with an oil-based makeup mixed with ground Alka-Seltzer. A splash of water then produced the fizzing effect.
Director / screenwriter Michael Crichton re-edited the first cut of the movie because he was depressed by how long and boring it was. Scenes that were deleted from the rough cut include the bank robbery and sales room sequences, hovercraft with passengers flying above the desert in the beginning, additional and longer dialogue scenes, more scenes with robots going crazy and killing guests including a scene where one guest is tied down to a rack and is killed when his arms are pulled out, longer chase scene with Gunslinger chasing Peter, Gunslinger cleaning his face with water after Peter throws acid on him. In Crichton's assembly cut there was also a different ending which included a fight between Gunslinger and Peter (which was deleted because it seemed like it was staged and foolish) and an alternate death scene of Gunslinger where he is killed with the same rack that was used by one of the other robots to kill one of the guests in previously mentioned deleted scene.

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