"Till Death Do Us Part" is the series finale of Pretty Little Liars, which premiered on the Freeform network in the United States on June 27, 2017. The twentieth episode of the seventh season and the 160th overall, it was directed by showrunner I. Marlene King, who also co-wrote the episode alongside Kyle Bown and Maya Goldsmith. Shortly after the two-hour final episode, a special titled "A-List Wrap Party" was aired, in which the main cast and King talked about the show's end and behind-the-scenes exclusives. In the episode, the Liars finally discover the identity of their tormentor, as Spencer (Troian Bellisario) discovers she has an identical twin sister named Alex Drake, who is revealed to be the anonymous "A.D." wanting to avenge Charlotte's death and take over Spencer's life as an impersonator due to her jealousy of the life that her sister has. The episode opened to lukewarm reviews from critics. Alex Drake's introduction and subsequent reveal as the series' final antagonist was met with a deeply polarizing response. Some viewers expressed dissatisfaction in regards to Alex's backstory and motives. Upon its initial airing, the episode was viewed by 1.41 million Americans and garnered a 0.7/2 Nielsen rating/share in the 18–49 demographic. The total viewership and ratings for this episode were considerably higher than the previous episode, and slightly higher than the sixth-season finale, a year earlier. Plot At night, the Liars are shown at an establishment discussing the fact that the truth about who was behind Uber A's mask never came out. Lucas appears in a white tuxedo tap dancing, while Jenna is riding a horse. The girls begin to talk about random and funny things until snow starts to fall from the sky and it is revealed that the previous scenes were the product of Mona's imagination, who is holding a snow globe in an unknown room at the Welby State Hospital. An "A.D." then appears and Mona drops the globe, breaking it instantly, as she gets surprised when she realizes who's there. In 2018, one year after the events of "Farewell, My Lovely", Ezra and Aria are discussing their book and its soon-to-be film adaptation in the Warner Bros. Television backlot. Now famous due to their book's worldwide success, they kiss and are photographed by a bunch of fans in a cart (staff writers of PLL in a group cameo). The scene then jumps to the