Till Death Do Us Part (Pretty Little Liars)

"Till Death Do Us Part"
Pretty Little Liars episode
The Liars saying a brief goodbye to each other during the episode's final moments. From left to right: Alison, Aria, Hanna, Emily and Spencer.
Episode no.	Season 7 Episode 20
Directed by	I. Marlene King
Story by	I. Marlene King & Kyle Bown
Teleplay by	I. Marlene King & Maya Goldsmith
Cinematography by	Larry Reibman
Editing by	Jill D'Agnenica
Production code	2M7220
Original air date	June 27, 2017 (2017-06-27)
Running time	89 minutes
Guest appearances
Chad Lowe as Byron Montgomery Holly Marie Combs as Ella Montgomery Mary Page Keller as Dianne Fitzgerald Torrey DeVitto as Melissa Hastings Keegan Allen as Toby Cavanaugh Lesley Fera as Veronica Hastings Brendan Robinson as Lucas Gottesman Julian Morris as Wren Kingston Vanessa Ray as Charlotte Drake Huw Collins as Archer Dunhill Jim Titus as Barry Maple Sydney Sweeney as Willa Celesse Rivera as Hadley St. Germain Ava Allan as Addison Derringer Tammin Sursok as Jenna Marshall Nia Peeples as Pam Fields
Episode chronology
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Pretty Little Liars (season 7)
List of episodes

"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.