<P> 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 . </P>
<P> 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 . </P>
who is the final a on pretty little liars
who is the final a on pretty little liars
Charlotte
Charlotte