Ratched is an American psychological thriller streaming television series created by Evan Romansky, developed by Ryan Murphy and starring Sarah Paulson in the title role of Nurse Mildred Ratched. A prequel to Miloš Forman's 1975 film One Flew Over the Cuckoo's Nest (based on Ken Kesey's 1962 novel of the same title), it depicts the life of Mildred Ratched prior to the events portrayed in the film, albeit in a different state (California as opposed to Oregon). Ratched received a two-season series order. The first season premiered on Netflix on September 18, 2020.