'Pretty Little Liars' season 7 episode 11 spoilers: Mona reminds the Liars about the what A.D. can do

The Liars will have to work with Mona (Janel Parrish) to outsmart A.D. in the latest trailer for the second half of "Pretty Little Liars" season 7.

In the trailer, Mona pointed out that their most dangerous enemy is always a step ahead of them. "We swim around in this fishbowl like we're in control. We are not," Mona said, while montages of Ali (Sasha Pieterse) and Emily (Shay Mitchell) running for their lives across a hallway is also shown in flashes. "There's always been somebody watching, manipulating."

Hanna's (Ashley Benson) frustration over their situation was also very obvious in the new trailer. She angrily told Aria (Lucy Hale) that A.D. already destroyed her life. But even after Aria assured her that everything will be okay, Hanna no longer believed her.

Emily (Shay Mitchell), on the other hand, asked Alison (Sasha Pieterse) what A.D. asked her to do. It seemed serious since their lives and the rest of the Liars will be in further danger in the hands of their tormentor.

Hale confirmed in an interview with Teen Vogue that the identity of A.D., also known as Uber A, will be confirmed in the remaining episodes of the seventh and final season.

"You finally get to figure out who that is and why this person has been out to get us for so long. It kind of comes out of left field too," the actress stated. "You see what's going on, and it makes a lot of sense. I was so scared that it would go in a direction that just didn't add up or make any sense at all. But it checked all the boxes for me, for lining up with everything, so I was happy with it and I think everyone else will be too."

"Pretty Little Liars" season 7B will begin on Tuesday, April 18, on Freeform.