Westworld

Westworld is a movie starring Yul Brynner, Richard Benjamin, and James Brolin. A robot malfunction creates havoc and terror for unsuspecting vacationers at a futuristic, adult-themed amusement park.
Delos is a futuristic amusement park that features themed worlds—ancient Rome, Medieval times and the Old West—populated by human-like androids. After two patrons have a run-in with a menacing gunslinger in West World, the androids at Delos all begin to malfunction, causing havoc throughout the park.