Question: 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"?
Related documents: [0]  [DOC] Mary Drake is a fictional character created by I. Marlene King and portrayed by Andrea Parker in the American television series "Pretty Little Liars". "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. It is believed that Mary is the on-screen counterpart of Courtney, though her recent characterization is more in line with Alison. The character makes her first official introduction during the sixth-season finale "Hush, Hush, Sweet Liars". The Liars discover that Mary is Jessica DiLaurentis' identical twin sister, a former patient at Radley Sanitarium who is Charlotte's biological mother. In "The DArkest Knight", Drake is also revealed to be Spencer Hastings' biological mother. During "Till Death Do Us Part", the elusive A.D. is revealed to be Alex Drake, Spencer's younger identical twin sister. Alex believed the Liars knew who was accountable for Charlotte's murder and was also set on physically replacing Spencer due to being jealous of the life that she had. [END] 
[1]  [DOC] Andrea Nicole Parker (born March 8, 1970) is an American television actress and former ballet dancer. She is known for her roles on "ER", "The Pretender", "Less than Perfect", "Desperate Housewives", and "Pretty Little Liars". [END] 
Answer: 
"Pretty Little Liars"
"Pretty Little Liars"