A teaser trailer for the new HBO TV show Westworld is the stuff nightmares are made of.
The clip for the science fiction thriller features Evan Rachel Wood sitting alone in a dark room as a fly crawls across her face.
"Have you ever questioned the nature of your reality?" she's asked.
Set at a futuristic Western-themed amusement park, the show is "a dark odyssey about the dawn of artificial consciousness and the future of sin," says HBO.