Danielle Turchiano Senior Features Editor, TVSPOILER ALERT: Do not read if you have not yet watched the first season of “Ratched,” streaming now on Netflix.For decades the character of Nurse Mildred Ratched from “One Flew Over the Cuckoo’s Nest” has been considered one of the most iconic fictional villains of all time. First created by Ken Kesey in his 1962 novel, she was then brought to life on the big screen by Louise Fletcher in 1975.