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HBO released the first full trailer for its sci-fi western “Westworld” on Sunday night, almost a year after debuting its first teaser.

The trailer, which features a massive orgy scene, opens to Delores (Evan Rachel Wood), a robot disguised as a human, sitting in a dark room and asked “have you ever questioned the nature of your reality?”

Set in a futuristic world, “Westworld” takes place inside of a theme park populated by robots. But the creators become worried when the androids begin to take on human characteristics.

“I’m terrified,” Dolores responds. “I feel spaces opening up inside of me, like a building with rooms I’ve never explored. I think there may be something wrong with this world. Something hiding underneath.”

Executive produced by J.J. Abrams and also starring Anthony Hopkins, Ed Harris and James Marsden, “Westworld” is a re-imagining of the 1973 film of the same name directed by Michael Crichton. Jonathan Nolan wrote, executive produced and directed two episodes. The series is also produced in partnership with Lisa Joy, Jerry Weintraub and Bryan Burk.

The one-hour drama, which HBO describes as a “dark odyssey about the dawn of artificial consciousness and the evolution of sin,” is set for an October premiere.