Them! is a 1954 science fiction film directed by Gordon Douglas. Police officer Ben Peterson (James Whitmore) is startled when strange events begin to plague his small community. He finds Gramps Johnson (Matthew McCue), a local shopkeeper, dead in his store with multiple injuries and formic acid in his body. In addition, a vacationing F.B.I. agent and his wife go missing after their trailer is destroyed by an unknown creature that has left a large footprint behind. The only person who seems to know what has happened is the agent's young daughter, but she is too traumatized to speak. When the F.B.I. learns that the agent is missing, it sends agent Robert Graham (James Arness) and scientists Harold (Edmund Gwenn) and Pat Medford (Joan Weldon) to investigate. After the team discovers that giant, mutated ants are causing the deaths, they must fight to destroy the creatures before they infest the rest of the world.