When the PLLs begin to question if Mona has been entirely truthful, she is attacked.
In the season four premiere, the girls turn to Mona for answers, now that she is also being targeted by "A." Plus, the contents of the trunk are revealed.
Get ready for more twists and thrills in season four of Pretty Little Liars as the girls strive to make sense of the mysterious "Red Coat" and what plans he or she may have in store for them. Starring Troian Bellisario, Ashley Benson, Tyler Blackburn, Lucy Hale, Ian Harding, Laura Leighton, Shay Mitchell, Janel Parrish and Sasha Pieterse, catch another "A"mazing season right here.
In the explosive season finale, the girls don't have time to ponder Spencer's fragile health as shocking revelations are brought to the forefront.
The stakes are high as each girl is forced into a difficult position. Will they be able to find a way out, or are they right where "A" wants them?
Spencer is missing, and the girls frantically search for answers, hoping their worst fears aren't true. But it's possible she's willingly disappeared.
Spencer is ready to talk, but Emily is not so ready to accept what she has to say. Hanna helps her mother after Ashley is involved in a hit-and-run.
After being shaken up by recent events and holding new information about Detective Wilden, Aria, Emily and Hanna hunt for details on the cop's past.
Spencer continues on her downward spiral by taking her anger out on Mona. Hanna plans to bring Caleb together with his father -- but will it backfire?
Ali's remains are with her family. But with all that has gone on since Ali's disappearance, the girls are torn about going to yet another memorial.
Aria knows she should tell Ezra about his son, but she isn't ready for the consequences. Hanna is determined to learn what Caleb is keeping from her.
Aria is sidelined by the flu, so Hanna and Emily follow up on a new clue on their own. Meredith takes care of Aria, but may have ulterior motives.
After the shocking events at the school marathon, Aria, Emily and Spencer are more certain than ever that Mona is up to her old tricks.
Radley Sanitarium has given Mona a clean bill of health and she is headed back to the halls of Rosewood High, much to the girls' dismay.
The girls are looking forward to some Halloween fun. But once aboard the Rosewood Ghost Train, they get more than just some childish tricks or treats.
As Garrett's trial brings media attention to Rosewood, Emily remains at odds with her friends over Paige, and she doesn't know where to turn.
Hanna, Aria and Emily go looking for answers.
Ashley isn't happy with Hanna.
Hanna wants answers from Shana.
What does Paige have in store for Emily?
Will Jake be able to help Aria?
Ready for Season 4? Click here for a must-see new video!
Keegan Allen performs "A Letter to My Bully" by Anonymous.
Spencer and Toby look for clues.