Before Alien became a landmark of science-fiction horror, its screenplay was caught in a bitter authorship dispute. Dan O'Bannon and Ronald Shusett developed the original story, initially titled Memory and later Star Beast, combining O'Bannon's idea of a crew trapped aboard a spaceship with Shusett's concept of an alien embryo implanted in a crew member and violently born from his body. After the pair brought the script to Brandywine Productions, producers Gordon Carroll, David Giler, and Walter Hill subjected it to extensive revision. Hill and Giler produced approximately eight drafts, expanding the android Ash subplot, reshaping dialogue, and cutting or modifying material set on the planet. O'Bannon regarded the changes with suspicion, believing the producers were trying to justify removing his name from the script and claiming credit for work he and Shusett had originated.
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