Mona reveals to them that Wren was going to kill her but she convinced him she could get Mary out.
Jenna uses her enhanced sense of smell to figure out "Spencer's not Spencer" and alerts Toby who tells the others. She explains that Sara was looking for Charlotte's false treasure in the Radley which was actually the secret file and Jenna recruited Noel to look for "Charlotte's sister". to use the Liars to find Charlotte's killer and killed Wren as he always saw her as Alex while she wanted to become Spencer to have her "perfect life". Alex ran away and met Wren who revealed everything about Spencer to her and introduced her to Charlotte who left her everything. Mary reveals she sold Alex to a London family to get out of Radley. One year later, Mary escapes from prison and Mona is released from Welby but rejoins the A-Team and is sent to kidnap Spencer, who comes face-to-face with A.D. ends the game as they have finally learned that Mona was Charlotte's killer. Mary confesses to Rollins and Jessica's murder. Mona, who is becoming addicted to the A-game again, reveals that she tried to scare Charlotte into not resuming the A-game but Charlotte attacked her and she killed her in self-defense. Aria is forced into playing and becomes A.D.'s new helper, destroying Emison's baby nursery and leaving an "A" message in Spencer's house, until the Liars catch her in the act and she defects. hires Sydney Driscoll as their helper and she fakes being A.D. then uses Emily's stolen eggs to impregnate Alison, as a way to further torture the liars. Mary reveals to Spencer that Peter and Jessica were planning to kill her, thus she used his pills to kill Jessica. Hanna and Spencer follow the trail of a private investigator he hired to find Mary and bump into Ted who reveals he has been hiding her as she is his college fling with whom he conceived Charles. Peter returns and reveals that Mary is the one who killed Jessica. sends Jenna to confess to the cops that Noel wanted money Charlotte left Jenna for another eye surgery, killed Sara and tried to kill Jenna in the blind school. One week later, Spencer has recovered and A.D. saves Jenna who asks if they shot Spencer. She then reveals that Spencer is her second child. Jenna prepares to kill Spencer, but is knocked out by Mary. In the confrontation, Noel is accidentally killed, and Spencer is shot by A.D., while Jenna corners Spencer. They leave the dollhouse videos on a table and someone takes them but Noel and Jenna attempt to murder them. He manages to escape and lures the Liars to an abandoned blind school. Hanna kidnaps Noel after negotiating with him doesn't work and films an interrogation video.
The Liars find videos in Noel's cabin of him torturing them in the dollhouse. tricks Hanna into believing Archer is alive and records her digging up his grave.
Sara reveals that they are all looking for the same thing but is killed soon after.
Jenna reveals that she became Charlotte's friend after feeling sympathy for her in Welby and helped Archer fake his identity to be with Charlotte. Jenna befriends Sara and Noel begins helping them. Toby discovers this and gets the cops to release Alison who reveals that she was the red jacket blonde but only tried to comfort Charlotte. Mona then traces most of the sent messages from a secret apartment where they find out his real name is "Archer Dunhill". The Liars find out Jenna is calling Elliot as "Archer" on his burner phone. She jumps out of the car and he gives chase but Hanna accidentally runs him over and they bury him in the woods. Elliot's true motive is later revealed to Alison she managed to use his phone to alert the girls to her location when he takes her out in his car one night. Emily finds the jacket in Alison's things and Caleb gives it to A.D. Aria suspects the red jacket blonde she saw entering the church was Alison. While discussing possible suspects, the girls' suspicion fell on Alison. gives the Liars 24 hours to find Charlotte's real killer or Hanna dies.