 Trevorrow and Connolly did not want to include previous characters in the new film without a good reason for their return to the series; they considered Dr. Henry Wu, the scientist responsible for recreating dinosaurs, a logical choice.In the first novel, Henry Wu had a much larger role, which was trimmed down for the film adaptation.Trevorrow said that the characters Alan Grant, Ian Malcolm, and Ellie Sattler were not included in the script because "I respect those actors too much to shoehorn them into this story for my own sentimental reasons.