Dennis Nedry

Dennis Nedry is the main human antagonist of Jurassic Park, a troublesome computer-network engineer for the succesful dinosaur-cloning faculty he was ordered to program without many details on what the park actually did and was called to the island to fix numerous bugs. However, Hammond refused to pay him any extra money for his work. Eventually, Lewis Dodgson of Biosyn (a rival company) offered Nedry $1.5 million to steal embryos from Jurassic Park's labs. In order to do this—and make a swift escape from the visitor center and drive away in a Jeep—Nedry had to shut down the park's security systems, including the electric fences surrounding the dinosaur paddocks, with the exception of the raptor fences. Without power, the fences go out, and the creatures escape