Westworld

In 1983, a futuristic amusement park called Delos features three themed worlds — Western World (the American Old West), Medieval World (medieval Europe) and Roman World (the ancient city of Pompeii). The resort's worlds are populated with lifelike androids that are practically indistinguishable from human beings. When two guests, Peter Martin (Richard Benjamin) and John Blane (James Brolin), visit Westworld, the androids in the saloon begin to malfunction after a violent confrontation with Yul Brynner as The Gunslinger, leading to chaos throughout the park.