James Whitmore and James Arness have their hands full when atomic testing in New Mexico mutates local ants into gigantic, marauding killers that threaten humankind.
Police Sgt. Ben Petersen (James Whitmore) and his partner find a young girl in shock wandering in the desert and while trying to solve the mystery of what happened to her, they discover something shocking. Giant ants have been mutated by atomic testing and are on a rampage, killing anyone who gets in their path.
Call in the FBI! James Arness plays FBI agent Robert Graham, who along with Dr. Harold Medford (Edmund Gwenn) and Dr. Patricia Medford (Joan Weldon), renowned entomologists, work to destroy the colony and save mankind from the insect invasion. Their mission takes them to the sewers of LA and a final standoff between the Army and the gigantic insects.
Them! is one of the best mutant bug films ever made. With top notch performances by a solid cast, this film is a delight. The special effects, especially the giant ants, are excellent considering when this movie was made. Then, there's that noise, that deliciously suspenseful and creepy sound the ants make. That sound is actually a chorus of bird-voiced treefrogs recorded in their natural habitat in the southeastern United States.
Be sure to look for cameos by Fess Parker, Leonard Nimoy, Dub Taylor, and Richard Deacon.