19. Farewell, My Lovely

The Liars are told by Caleb that Mona has the board game and jump to conclusions that Mona is "A.D.". Mary meets with Spencer at Lost Woods Resort and gives her ownership of the building. Mona reveals that Charlotte never recovered and was going to resume the A-game. She confronted Charlotte and threatened to push her out the window but never planned to go through with it. When Hanna, Caleb and Spencer take Mona back to their car, the final two puzzle pieces are waiting. Later, the Liars gather in a room at the Lost Woods and put the two final puzzle pieces in.

When the pieces are in place, the game says "Congratulations. Claim the grand prize", a picture of Archer. Augmented reality shows a man walking toward Aunt Carol’s house. The Liars are arrested by Tanner at Aunt Carol's where Archer's body is found. Mary lies and says she killed Archer, also confessing to Jessica's murder, saving the Liars from a murder charge. Mona reveals that after she stopped threatening her, Charlotte attacked Mona and in the struggle she accidentally killed Charlotte in self-defense. "A.D." ending: "A.D." drives off into the sunrise with the Liars' game pieces in a plastic bag.