Later that night, Mona knocks the real Spencer Hastings unconscious at A.D.'s request. Spencer wakes up in a cell and looks at what she believes to be a mirror before it is revealed to be Alex. Alex shares her entire past with Spencer, including her previous moments that she posed as her. Alex reveals that she had once forced Wren to shoot her in order to match Spencer's gunshot wound and that the plan was to physically replace Spencer, but she later murdered Wren when she realized he would always see her as Alex. Alex poses as Spencer to attend Aria and Ezra's wedding. However, Ezra is missing, and it is revealed that Alex is holding him prisoner in the same bunker Spencer's trapped in. Once Alex returns to the bunker, Ezra and Spencer attempt to convince Alex they understand her motives for becoming "A.D." However, Alex, who has fallen in love with Toby, remains determined to take Spencer's place in life. Pretending to be Spencer in public, Alex bumps into Toby at a barn. Toby is concerned after Spencer's horse, recognizing that Alex isn't Spencer, refuses to be ridden by her. Toby's stepsister, the blind Jenna Marshall, also has a run in with Alex. She is unable to recognize Alex's scent and calls Toby to warn him that there's an impostor posing as Spencer. Toby, the Liars and Caleb Rivers are able to determine Spencer and Ezra's location. After rescuing them, Toby is able to determine the real Spencer between her and Alex, and Alex and Mary are arrested. Sometime later, Mona is running a doll store in France where she holds Alex and Mary hostage. Pretty Little Liars: The Perfectionists It is implied during the first episode of Pretty Little Liars: The Perfectionists that Alex and Mary escaped from Mona's dollhouse and are now on the run. Reception The character'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. Some television critics were welcoming towards the twist. Gavin Hetherington of SpoilerTV enjoyed Alex's reveal as "A.D." and her connection to Spencer, stating it was "actually well done." Yana Grebenyuk of TVFanatic echoes the same sentiments of praise, writing that