Them!' THEM! is a 1954 American science fiction film directed by Gordon Douglas. It tells the story of a group of people in New Mexico who discover giant mutated ants that have been created by nuclear testing in the desert. The film stars James Whitmore, Edmund Gwenn, Joan Weldon, and James Arness. It was one of the first films to depict giant monsters as a result of nuclear radiation and is considered a classic of the genre.