HBO has unleashed the new Westworld trailer! HBO has unleashed the new Westworld trailer! You can watch two versions of the trailer, the mature version and normal version, using the players below! The one-hour drama series Westworld is a dark odyssey about the dawn of artificial consciousness and the evolution of sin. Set at the intersection of the near future and the reimagined past, it explores a world in which every human appetite, no matter how noble or depraved, can be indulged. The cast includes Anthony Hopkins, Ed Harris, Evan Rachel Wood, James Marsden, Thandie Newton, Jeffrey Wright, Tessa Thompson, Sidse Babett Knudsen, Jimmi Simpson, Rodrigo Santoro, Shannon Woodward, Ingrid Bolsø Berdal, Ben Barnes, Simon Quarterman, Angela Sarafyan, Luke Hemsworth and Clifton Collins, Jr. Inspired by the motion picture Westworld, written and directed by Michael Crichton.