<P> A third report about a large sugar theft at a rail yard leads Peterson, Graham, and Major Kibby to Los Angeles . An alcoholic in a hospital "drunk tank" claims he has seen giant ants outside his window . The mutilated body of a father is recovered, but his two young sons are missing . Peterson, Graham, and Kibby find evidence that they were flying a model airplane in the Los Angeles River drainage channel near the hospital . Martial law is declared in Los Angeles, and troops are assigned to find the ant nest in the vast storm drain network under the city . </P> <P> Peterson finds the two missing boys alive, trapped by the ants . He calls for reinforcements and lifts both boys to safety, just before being attacked . Graham arrives with reinforcements and kills the ant, but Peterson dies from his injuries as others swarm to protect the nearby nest . Graham and the soldiers fight off the ants, but a tunnel collapse traps Graham . Several ants charge, but he is able to hold them off with his submachine gun just long enough for troops to break through the collapse . The queen and her hatchlings are discovered and quickly destroyed with flamethrowers . Dr. Medford offers a philosophic observation: "When Man entered the Atomic Age, he opened the door to a new world . What we may eventually find in that new world, nobody can predict". </P> <Ul> <Li> James Whitmore as Sgt . Ben Peterson </Li> <Li> Edmund Gwenn as Dr. Harold Medford </Li> <Li> Joan Weldon as Dr. Pat Medford </Li> <Li> James Arness as FBI Agent Robert Graham </Li> <Li> Onslow Stevens as General O'Brien </Li> <Li> Sean McClory as Major Kibbee </Li> <Li> Chris Drake as Trooper Ed Blackburn </Li> <Li> Sandy Descher as Ellinson girl </Li> <Li> Mary Ann Hokanson as Mrs. Lodge </Li> <Li> Don Shelton as Captain Fred Edwards </Li> <Li> Fess Parker as Alan Crotty </Li> <Li> Olin Howlin as Jensen, the alcoholic </Li> <Li> Dorothy Green as police matron </Li> </Ul> <Li> James Whitmore as Sgt . Ben Peterson </Li>

Who was the little girl in the movie them