As HBO's sci-fi/western Westworld continues through the second half of Season 1, the network has now released a teaser for this Sunday's episode.

　　The episode is titled "Trompe L'Oeil," which basically means optical illusion. This being Westworld, that title could mean a number of interesting things. Check out the spoiler-filled video below, while more spoilers about Episodes 1-6 follow further down the page. The episode airs this Sunday, November 13, at 9 PM.

　　Main characters Dolores (Evan Rachel Wood) and William (Jimmi Simpson) were nowhere to be seen in November 6's Episode 6, "The Adversary," but they'll be back for the next chapter.

　　The synopsis states that Dolores and William will "journey into treacherous terrain," while Maeve (Thandie Newton) "delivers an ultimatum." The character Bernard (Jeffrey Wright) "considers his next move" in Episode 7, though it remains to be seen what that might mean.

　　The teaser video shows that Dr. Ford is getting strong-armed by members of Delos, which operate the park, while Maeve continues down her path of self-awareness. We also see Dolores questioning her existence as well, while Ford ends the video by teasing that the hosts are "free," but under his control

　　There will be 10 episodes in all for Westworld's first season. HBO has yet to confirm if the show will be renewed for Season 2, but the company's programming president suggested it's going to happen.

　　Check back with GameSpot soon for more on Westworld Episode 5.