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Jurassic Park

Industrialist John Hammond has created Jurassic Park, a theme park featuring de-extinct dinosaurs, on the tropical island Isla Nublar, off the coast of Costa Rica. After a Velociraptor kills a dinosaur handler, the park's investors, represented by lawyer Donald Gennaro, threaten to pull funding unless experts certify the island's safety. Gennaro invites the chaotician Ian Malcolm, while Hammond invites the paleontologist Alan Grant and the paleobotanist Ellie Sattler. Upon arrival, the group is shocked to see living Brachiosaurus and Parasaurolophus. At the park's visitor center, the group learns that the cloning was accomplished by extracting dinosaur DNA from prehistoric mosquitoes preserved in amber. DNA from frogs and other animals was used to fill in gaps in the dinosaurs' genome. To prevent the dinosaurs from breeding, they are all made female by chromosome manipulation.

The group witnesses the hatching of a baby Velociraptor and visits the raptor enclosure. During lunch, they debate the ethics of cloning and of the park in general. Malcolm warns of the implications of genetic engineering while Grant and Sattler express uncertainty over the ability of humans and dinosaurs to coexist. Hammond's grandchildren, Lex and Tim, join the others for a park tour in two self-driving electric vehicles, while Hammond observes them from the control room. Most of the dinosaurs fail to appear, and the group encounters a sick Triceratops. The tour is cut short as a tropical storm approaches. The park employees leave for the mainland on a boat while the visitors return to their vehicles; Sattler stays behind to study the Triceratops.

Jurassic Park's disgruntled computer programmer, Dennis Nedry, was previously bribed to steal frozen dinosaur embryos by Lewis Dodgson, a man working for Hammond's corporate rival. To access the embryo storage room, Nedry deactivates the park's security system, cutting power to the tour vehicles. Most of the park's electric fences have been deactivated, which allows a Tyrannosaurus rex to escape and attack the touring group. The Tyrannosaurus devours Gennaro and injures Malcolm while Grant, Lex, and Tim escape. On his way to deliver the embryos to the island's docks, Nedry gets lost in the rain, crashes his vehicle, and is killed by a venom-spitting Dilophosaurus.

Sattler helps the game warden Robert Muldoon search for survivors; they find Malcolm just before the Tyrannosaurus returns and chases them away. Grant, Lex and Tim take shelter in a tree and encounter a Brachiosaurus herd, then discover the broken shells of dinosaur eggs the following morning. Grant concludes that the dinosaurs are breeding, which is possible because of their amphibian DNA—animals like West African frogs can change their sex in a single-sex environment.

Unable to decipher Nedry's code to reactivate the security system, Hammond and chief engineer Ray Arnold decide to reboot the park's systems. They shut down the power grid and retreat to an emergency bunker while Arnold heads to a maintenance shed to complete the rebooting process. When Arnold fails to return, Sattler and Muldoon go to the shed, and discover that the shutdown has released the Velociraptors. Sattler turns the power back on before being attacked by a raptor and discovering Arnold's severed arm. While she escapes, Muldoon is killed by another Velociraptor.

Grant, Lex and Tim reach the visitor center. Grant leaves to look for Sattler, leaving Lex and Tim inside. The raptors appear and pursue the children through a kitchen, but they escape and join Grant and Sattler. The group reaches the control room, and Lex restores the park's systems, allowing them to contact Hammond, who radios for a helicopter to take them off the island. As the group tries to leave they are cornered by the two raptors, but the Tyrannosaurus appears and fights the velociraptors. It kills the first by biting it, and throws the second into a skeleton on exhibit, killing it as well.

The group flees and boards the helicopter, and Grant and Hammond agree not to endorse the park.