The Time Machine (1960)

The Time Machine (also known promotionally as H. G. Wells' The Time Machine) is a 1960 American science fiction film in Metrocolor from Metro-Goldwyn-Mayer, produced and directed by George Pal, that stars Rod Taylor, Yvette Mimieux, and Alan Young. The film was based on the 1895 novella of the same name by H. G. Wells that was influential on the development of science fiction.

An inventor in Victorian England constructs a machine that enables him to travel into the distant future; once there, he discovers that mankind's descendants have divided into two species, the passive, childlike, and vegetarian Eloi and the underground-dwelling Morlocks, who feed on the Eloi.

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The Morlocks use sirens to hypnotise the Eloi. After several hundreds of years of nuclear war, the siren had gradually become a hypnotic trigger for the Eloi, hypnotising them to walk towards the underground just as their ancestors did centuries ago. George, due to the siren being completely unknown to him, is unaffected.