The film takes liberties with Dean Koontz’s 1987 novel, a source of frequent complaints from those who feel the book is much better—nothing surprising there, especially given its length (512 pages) compared to the movie's runtime of 1 hour and 31 minutes. It blends adventure, science fiction, and horror elements, drawing comparisons to films like “Terminator” and “Predator,” but with a teenage boy, Travis, as the …