Pretty Little Liars Season 7 episode 16 spoilers: Yet another twin theory is doing the rounds

Pretty Little Liars has just a few more episodes before the series wraps up and viewers find out the real identity of AD, the villain who has been tormenting the Liars since Charlotte's death.

According to one popular theory, AD is Spencer's twin and as the season progresses, this theory seems more plausible. And viewers have already seen Spencer's twin as Bethany Young.

Check out the theory here. 

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Meanwhile, this Tuesday's episode will focus on Furey finding out what really happened to Archer Dunhill. The promo for the episode shows Troian Bellisario's Spencer being questioned about Archer's disappearance. But Spencer is determined to keep the secret. The scene then cuts to the Liars planning their next move and Lucas finally revealing the truth to Hanna about why she was tortured.

The official synopsis for Season 7 episode 16 reads:

As Detective Furey closes in on uncovering what happened to Archer Dunhill, the Liars team up to protect one of their own. Hanna continues to struggle with the idea that Lucas might be connected to A.D. even in the face of more evidence. Emily surprises Ali with a heartfelt gesture that is undone by A.D. machinations; and the Liars gain insight into where the idea for the game originated.

Check out the promo for the episode below:

Pretty Little Liars actress Shay Mitchell, who plays Emily on the show, recently opened up about the endgame and said there couldn't have been a better finale.

"I think we're ending it at the most perfect time and honestly, there couldn't have been a better ending for this," she said in an interview with Entertainment Weekly. "The whole arc, I don't know how you guys did it, to honestly keep a mystery going on for that long and still have every episode be such an amazing one to watch that's kept the fans engaged is incredible," Mitchell said.

Pretty Little Liars airs Tuesdays on Freeform.