HBO has released the first full trailer for it’s upcoming series, Westworld.

The trailer is labeled as a teaser, but it offers much more footage and insight into the series than the last tease which was released back in August. It feels like a full trailer, but I suppose it also counts as a teaser since it leaves us wanting more.

Check out the newest trailer below.

Westworld is based on the 1973 Michale Crichton film of the same name. In the original film starring James Brolin and Richard Benjamin, two friend visit a high-tech theme park where people can experience three different recreated eras/worlds. There is the Roman World, Medieval World, and West World. It is unclear based on the trailer if the park in the series will only focus on West World or also contain the others from the original movie.

In the original film, each world is filled with androids who, if this were a video game, would be the computer players. Yul Brynner starred in the 1973 film as the Gunslinger, an android in West World who challenged visitors to pistol duels and later becomes obsessed with killing the two main characters after a virus turns all the robots into crazed killing machines.

The original story was dark, and the trailer for the series looks even darker. In HBO’s Westworld, Ben Barnes and Jimmi Simpson play the two friends visiting the theme park. Ed Harris is filling the role of the villain known as The Man in Black and James Marsden will portray the Gunslinger. Thandie Newton will play a madame and Evan Rachel Wood an android who becomes aware of what she is. The head of programming and android creation will be played by Jeffrey Wright, and to round out the all-star cast, Anthony Hopkins will play the creative genius behind Westworld.

It’s been a long project in the making, but HBO has announce that the project will premiere this fall. Westworld has struggled to get off the ground since the project was first ordered in 2013. The shooting for the series began all the way back in 2014 but was put on hold so writers Jonathan Nolan and Lisa Joy could get ahead on the script. Many have feared the project would never see the light of day because of rumors that HBO and Nolan were having creative differences and the network being frustrated that the show was not coming together on time. The series was intended to premiere in 2015 but has since been pushed back to this fall.

Westworld will now premiere on HBO sometime in October.