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'Pretty Little Liars' season 7B spoilers: Aria and Ezra deal with Nicole's return; Shay Mitchell talks about emotional last day on set

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Aria (Lucy Hale), Spencer (Troian Bellisario), Hanna (Ashley Benson), Emily (Shay Mitchell), and Alison (Sasha Pieterse) are ready to end the games when "Pretty Little Liars" returns for the second half of its final season this spring.

According to SpoilerTV, the back half of season 7 picks up exactly where the previous episode left off. The midseason premiere will see Aria and Ezra (Ian Harding) deal with the return of Nicole (Rebecca Breeds) and what her arrival means for their relationship. Fresh from being shot by A.D., Spencer will try to find more answers after discovering that Mary Drake (Andrea Parker) is actually her biological mother.

Meanwhile, Alison copes with the news of her pregnancy, while Emily continues to support her by guiding her on what she should do next. Also, Hanna and Caleb (Tyler Blackburn) figure out where their relationship is headed after spending a romantic night together.

The cast members have already finished filming the show last year, and most of them got emotional when they shot the finale. In an interview with TV Guide, Mitchell shared what it was like for her to say goodbye to the cast and crew during their last day on set.

"I had no eyelashes on. My mascara was gone. I was completely a mess," the actress admitted. "It was probably one of the hardest days I've hard," she added. Pieterse, who plays Mitchell's current love interest in the show, said it was difficult for her to say goodbye because the cast and crew became very close over the years.

"We've been through funerals, weddings and births -- everything you can think of," she explained, adding, "We became a family."

Aside from the major characters, familiar faces are set to resurface for the show's last 10 episodes. Returning characters for this season include Wren Kingston (Julian Morris), Pastor Ted Wilson (Edward Kerr), Jenna Marshall (Tammin Sursok), Paige McCullers (Lindsay Shaw), Melissa Hastings (Torrey DeVitto), and Sydney Driscoll (Chloe Bridges).

The seventh and final season of "Pretty Little Liars" returns on Tuesday, April 18 at 8 p.m. ET on Freeform.