Allen is a world renowned paleontologist. He was working at a dig site just outside Snakewater, Montana when he was invited by John Hammond to attend and evaluate Hammond's new dinosaur park. Allen agreed to Hammond's invitation to tour the park, finding it difficult to turn down the request from a major financial donor, unaware that Hammond had cloned living dinosaurs. During a massive storm, the dinosaurs escaped, and Allen became stranded in the park with Hammond's grandchildren. However, using his ingenuity, he was able to escape after a only a few minor mishaps. He enjoys running in the rain, climbing trees, and throwing road flares.