As the second anniversary of Alison's disappearance nears, Aria, Emily, Hanna and Spencer are thrown back into turmoil after a shocking night.

One of Aria's past indiscretions is fodder for a new A. A still-shaky Emily tries to focus on school, but could be derailed when she remembers a crucial piece from that night.

When Spencer questions her mother taking on Garrett's case, she stumbles upon a larger secret; Aria agrees to be Jenna's accompanist.

Hanna and Mona's visits cause tension with Caleb; Emily finds solace after meeting Maya's cousin; Spencer must know the truth about Melissa.

Aria, Emily, Hanna and Spencer think Jenna's birthday party could be the perfect setting for A to strike - and for them to catch their tormentor.

A new clue could lead the girls down the wrong path. Emily gets another flashback from that night, leading to a surprising suspect, and Aria questions Ezra's new influx of cash.

With new key evidence in Alison's murder case, Hanna fears that A may be framing her after a visit from Det. Wilden; Aria decides that she has to turn to Mona for answers; Someone from Ali and Jason's past arrives in Rosewood.. Written by ABC Family Publicity

Trying to explain the drugged flask to Paige leads Emily to more insights about that night; Spencer asks Caleb for help; Aria learns about Ezra's past.

Aria and Spencer may engage in a heated game of Truth to get some answers from Jenna - but are they willing to give up some of their truths?

The liars follow a lead about where Maya might have been before her murder; Aria must deal with the aftermath of meeting Ezra's mom.

Spencer learns about Paige's shocking past with Ali, but will Emily listen to what her friends have to say?; Aria feels she has to help Ezra move on from his past.

Emily is caught in the crossfire as Maya's murderer is revealed; The liars are betrayed by someone close to them.

Trick or treat? The Rosewood Halloween Ghost Train becomes one killer party in this special Halloween-themed episode. Plus, Adam Lambert performs.

Radley Sanitarium gives Mona a clean bill of health, and she heads back to Rosewood High, much to the liars' dismay.

Aria, Emily, Hanna and Spencer are sure that Mona is up to her old tricks again, but can they prove it? Meanwhile, Aria's fears about her father grow stronger.

Meredith helps take care of Aria when she is sick - but could she have ulterior motives?; Spencer surprises Toby for their anniversary.

Will their secrets drive the girls to take desperate actions that could make things worse? Plus, Emily learns more about what Ali may have been hiding the summer before her murder.

Alison's family is set to bury her again, now that they have her remains, but the girls are divided about going to yet another memorial; Emily visits Dr. Sullivan.

Spencer takes her anger and hurt over her breakup out on Mona; Aria finds she is spending more time with Wes; Emily and Jason work together.

Holding new information about Detective Wilden, Aria, Emily and Hanna are on the hunt for answers about the detective's past; Spencer finds someone to lean on.

Spencer is now ready to talk, but Emily is not ready to accept what she has to say. Hanna helps her mother and keeps a new secret, and wonders if A had something to do with it.

Aria, Emily and Hanna try to locate a missing Spencer - but Spencer may not want to be found; Emily meets Olympic gold medalist Missy Franklin.

A plays games with higher stakes. Aria considers things with Ezra and Hanna is thrown in the midst of Caleb's family drama. Spencer looks for answers about Mona's time in Radley.

In the third season finale, the girls attempt to put an end to the game. With so much happening and new information uncovered, will the girls be ready for what is waiting for them?