when do we meet a in pretty little liars
Charlotte Drake During the fourth-season episode "Now You See Me, Now You Don't", CeCe is revealed to be Red Coat.[1][2] In the sixth-season episode "Game Over, Charles", Drake unmasked herself as Big "A", and revealed that she was born male and underwent gender reassignment surgery. In the following episode "Of Late I Think of Rosewood", it is shown that Charlotte spent the subsequent five years at the Welby State Psychiatric Hospital. Charlotte is eventually released from Welby after the Liars (minus Aria) lie under oath and testify in favor of her release as a favor to Alison. However, Charlotte is murdered by an unknown assailant merely hours after leaving Welby. Her death fueled the rise of a new "A", using the alias A.D., who was severely adamant on avenging Charlotte's homicide. During the sixth-season finale "Hush, Hush, Sweet Liars", the Liars discover that Jessica DiLaurentis has an identical twin sister, Mary Drake, a former patient at Radley Sanitarium who is Charlotte's biological mother. In "The DArkest Knight", Mary is revealed to be Spencer Hastings' biological mother, thus making her Charlotte's maternal half-sister. During "Farewell, My Lovely", Mona confesses to killing Charlotte after finding out that her mental health hadn't improved and her intentions were to harm the Liars again. In "Till Death Do Us Part", the elusive A.D. is revealed to be Alex Drake, Spencer's identical twin sister. Alex believed the Liars knew who orchestrated Charlotte's murder and was also set on physically replacing Spencer due to envying the upbringing she was able to have.