'Logan's Run' is the 1976 science fiction film starring Michael York set sometime in the 23rd century, where the remnants of human civilization live in a sealed domed city run by a computer that takes care of all aspects of their life, including reproduction.
The citizens live a mostly hedonistic lifestyle until the age of 30, when they must undergo the ritual spectator sport of "Carrousel," where they are publicly vaporized with the promise of being "Renewed."
To track this, the humans are implanted at birth with a Lifeclock crystal in the palm of their hand that changes colors as they approach their "Last Day." To maintain order, the computer has assigned several humans as Sandmen (policemen), who chase after and terminate "Runners" (those that try to leave the city in order to escape Carrousel).
