Westworld is an American science fiction western thriller television series created by Jonathan Nolan and Lisa Joy for HBO. It is based on the 1973 film of the same name, which was written and directed by American novelist Michael Crichton, and to a lesser extent on the 1976 sequel Futureworld. It is the second TV series based on the two films, the first being the short-lived 1980 series Beyond Westworld. Nolan and Joy serve as executive producers along with J. J. Abrams, Jerry Weintraub, and Bryan Burk, with Nolan directing the pilot. The first season premiered on October 2, 2016, concluded on December 4, 2016, and consisted of ten episodes. In November 2016, HBO renewed the show for a ten-episode second season, set to debut April 22, 2018.
The story takes place in the fictional Westworld, a technologically advanced Wild West-themed amusement park populated by android hosts. Westworld caters to high-paying guests, who may indulge in whatever they wish within the park, without fear of retaliation from the hosts.
The series' debut on HBO garnered the network's highest viewership ratings for a premiere since the first episode of True Detective in 2014 and Westworld ranks as the most-watched first season of an HBO original series ever. Westworld has received largely positive reviews from critics, with particular praise for the visuals, story, and performances.