In January 2003, Jeff Goldblum said he had been asked to stay available for a possible return of his character Ian Malcolm. At the end of the month, it was reported the story would involve dinosaurs migrating to the Costa Rican mainland. A team of experts, including Alan Grant and Ian Malcolm, chart an expedition to an offshore island and discover the dinosaurs breeding freely. The plot would involve the characters devising a way to restrict the spread of the dinosaurs and prevent an ecological disaster. Early concept art depicted genetically engineered human-dinosaur mercenaries. Stan Winston's special effects studio, which worked on the previous films, was in the design phase for the film as of April 2003. Winston said Spielberg wanted to adapt several unfilmed scenes from Michael Crichton's Jurassic Park novel and its sequel The Lost World. By July 2003, Keira Knightley was in consideration for two roles, including a small role as a granddaughter. Monahan's first draft of the script was finished later that month; the story was not set in a jungle, as in previous films. Neill confirmed he would reprise his character; filming was set to begin in 2004 in California and Hawaii.