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Have the liars found out who "A.D." is? In a preview for the next episode of "Pretty Little Liars", Hanna believes that Noel Kahn is the bad guy. She is later seen meeting someone who warns her that "the threat against you is close," before Kahn interrupts them, which only strengthens her suspicion.

Alison looks for more information and gets a death threat that tells them to stop. Meanwhile, someone is trying to hit Caleb and Hanna during a walk. Caleb pushes her away to protect her and sacrifices himself. Caleb is unconscious but Hanna sees the face of the bad guy, and it's Kahn.

"Exes and OMGs" airs Tuesday, August 16 at 8/7c on Freeform. According to the official synopsis, "Emily goes up for a position as the Rosewood High swim coach, only to learn that her ex-girlfriend Paige is also up for the job. Hanna is visited by Mrs. Grunwald after she has a vision that the PLLs are in danger. The girls track down the doctor who delivered Mary's baby in order to get answers. Ali decides to go back to work to help bring some normalcy to her life again."