He is the main protagonist of "Jurassic Park III." In the years since the incident on Isla Nublar, Grant has continued his research on fossils, shrugging off the notion that such endeavors are moot with living dinosaurs on Isla Sorna by claiming that InGen's creatures are just "genetically engineered theme park monsters" and not real dinosaurs. As in the first film, his research is focused on "Velociraptors" and he has proposed new theories regarding raptor intelligence. Grant reluctantly agrees to join an allegedly wealthy couple for an aerial tour of Isla Sorna, Jurassic Park's "Site B", in exchange for funding for his dig site. However, the plane crashes and they become stranded on the island. While navigating it, Grant realizes that his theories about raptors – that they have advanced intelligence and communication abilities – are correct. He escapes the island after a rescue operation.