<P> 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 . Many viewers expressed considerable dissatisfaction in regards to Alex's backstory and motives . Moreover, Troian Bellisario's performance also faced mixed reviews, with her attempt at a British accent being singled out for criticism . However, Janel Parrish's performance was unanimously praised, with most raving the conclusion to Mona Vanderwaal's character arc . 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 slightly up in comparison to the previous episode and the sixth - season finale a year ago . </P> <Table> <Tr> <Td> </Td> <Td> This episode's plot summary may be too long or excessively detailed . Please help improve it by removing unnecessary details and making it more concise . (July 2017) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This episode's plot summary may be too long or excessively detailed . Please help improve it by removing unnecessary details and making it more concise . (July 2017) (Learn how and when to remove this template message) </Td> </Tr> <P> 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 . </P>

Pll till death do us part full episode