What television series was an adaptation of a novel and had a character played by an actress who is also known for her roles on "ER" and "Desparate Housewives"?
Mary Drake:  "Pretty Little Liars" is a television adaptation of the novel series of the same name written by Sara Shepard, in which the antagonist Alison DiLaurentis has an identical twin sister, Courtney DiLaurentis. Andrea Parker:  She is known for her roles on "ER", "The Pretender", "Less than Perfect", "Desperate Housewives", and "Pretty Little Liars".
i don't know