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By the time Crichton had finished his novel, Spielberg and Koepp had already been discussing ideas for the film for more than a year. rex chasing a herd of Gallimimus, Spielberg said, "You're out of a job", to which Tippett replied, "Don't you mean extinct?Spielberg did not allow for cast rehearsals: "You want to capture the actors when they taste the words for the first time, when they look at each other for the first time – that's the sort of magic you can only get on a first or second take". He was one of six people considered for the role, [47] [48] which ultimately went to actor Harvey Jason. The crew also shot the scenes involving the power supply on Stage 23 before going to Red Rock Canyon for the Montana dig scenes. James Cameron revealed in 2012 he tried to get the rights only to discover that Spielberg acquired them a few hours prior.

Besides Isla Nublar, Ian learns that InGen had another facility, "Site B", on Isla Sorna, where the company's dinosaurs were cloned. The crew filmed scenes for the Park's labs and control room, which used animations for the computers lent by Silicon Graphics and Apple. After being rescued, Nick reveals that he stole Roland's ammunition, to prevent him from killing his trophy. Ian, Sarah, Nick, and Kelly are rescued by Ludlow's team and are forced to work together after losing all their communications equipment. The film spawned a multimedia franchise that includes five sequels – The Lost World: Jurassic Park (1997), Jurassic Park III (2001), Jurassic World (2015), Jurassic World: Fallen Kingdom (2018), and Jurassic World Dominion (2022) — a television series, video games, theme park attractions, comic books, and various merchandise.Most of the park's electric fences have also been deactivated, allowing the Tyrannosaurus to escape and attack the group. After a Velociraptor kills a dinosaur handler, the park's investors, represented by lawyer Donald Gennaro, demand a safety certification. In the film, Burke identifies the dinosaur as Compsognathus triassicus, which in reality is a non-existent species.

The footage inspired the incorporation of an animal falling as one of the artists did trying to make the jump. Spielberg also expressed disappointment with the film, stating he had become increasingly disenchanted with it during production.

In the aftermath, the dinosaurs are shipped back to Isla Sorna accompanied by the United States Navy, while Ian, Sarah, and Kelly watch Hammond in a televised interview announcing that the American and Costa Rican governments have declared the island a nature reserve.