HBO has dropped a 30-second teaser for its upcoming sci-fi series Westworld , and it's delightfully sinister. Check it out below.

Loosely based on Michael Crichton 's 1973 sci fi film of the same name, Westworld is set in a theme park where robots fulfill human guests' most hedonistic desires. However, HBO president Michael Lombardo told us earlier on in the month that the series will focus on the robots this time around."This is very much told from the POV of the robots", said Lombardo. "The corporate world’s as dimensionalized as the park. And I think the visitors to the park are really not the primary focus of our show at all. So again, without giving more than that away, I think all I can say is only one character that you saw in the clip is a visitor to the park. And yeah, it resembles the film in name and in spirit and but really is, I think, otherwise not much of a reference point.”We recently saw a much longer trailer for the series with more character detail at the TCA press tour - check out our thoughts. Westworld will star Anthony Hopkins James Marsden and Ed Harris . It's being developed for HBO by executive producers J.J. Abrams Jonathan Nolan (The Dark Knight trilogy, Person of Interest) and Lisa Joy (Burn Notice), and is set to debut on HBO in 2016.

Lucy O'Brien is Entertainment Editor at IGN’s AU office. Follow her ramblings on Twitter.