Last week (July 30), we got a first look at Sarah Paulson as the evil, iconic Nurse Mildred Ratched in Ryan Murphy’s eponymous prequel to One Flew Over the Cuckoo’s Nest. Now, the first full trailer for Ratched has been released.

Opening with the sinister Ratched arriving at a Northern Californian psychiatric hospital in 1947, where she poses as a dedicated nurse and witnesses “new and unsettling experiments on the human mind”, the trailer goes on to tease some pretty gruesome-looking procedures reminiscent of American Horror Story.

It also offers a closer look at the roles of some of Paulson’s co-stars, who include Cynthia Nixon, Judy Davis, Sharon Stone, Jon Jon Briones, Finn Wittrock, Charlie Carver, Alice Englert, Amanda Plummer, Corey Stoll, Sophie Okenedo, and Vincent D'Onofrio.

Besides executive producing Ratched, Ryan Murphy has reportedly directed two episodes of the series, which has currently been picked up for two seasons of 18 episodes each, and will premiere on Netflix September 18.

Watch the new trailer below.