Emily deals with a jealous teammate; Aria and Ezra their first public date; Spencer turns to Jason for information.

Emily and Paige are pitted against each other in the big race; Caleb calls in his favor with a guilty Hanna; Spencer takes on the task of tutoring a fellow student to get answers.

It's parent-teacher conferences and one little liar's father sits face to face with the love of her life. Better believe that "A" has something to say about it.

After a shocking revelation from the police, it looks like the liars could be crying wolf. With everything pointing to Ian, could the girls be wrong?

As the heat is turned up on suspicions surrounding Spencer, the liars must come to the harsh realization that they aren't the only ones hiding secrets in Rosewood.

Everyone has something to hide, but having to live with those secrets can become a big burden for the liars; Spencer and Toby aren't able to be seen together; Rosewood police officer Garrett keeps his promise to keep a close eye on the girls - much closer than they realize.

A surprising new victim of "A" is revealed; Spencer runs from her family troubles right into Wren's arms; Ezra's new opportunity could push him away from Aria.

The girls go to the hotel Ali checked in before she disappeared. Spencer discovers Mona's secret. Dr Sullivan comes back to Rosewood.

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.

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.

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.

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.

The PLLs work with Mona to try and get some clarity on A.

The presence of Mrs. DiLaurentis continues to unnerve all those around her; Toby shares a heartbreaking secret with Spencer; "A" nearly kills Mona.

A new detective means new questions, and the liars are asked some hard questions; Spencer lays a trap for Melissa.

Paige throws Emily a surprise birthday party; Mona's selfless act provides Hanna and her mother with their first bit of good news; Ezra gets some distressing news.

Ezra reaches out to Aria, just as she decides to move on with Jake; A Western-themed dance turns into a two-step with "A"; Hanna is stalked by a fellow student.

An intriguing riddle from "A" has the liars hitting the road and heading to Ravenswood, where they make a shocking discovery.

Now it's confirmed that Alison is alive, who was buried in Ali's coffin?

Spencer's numerous sleepless nights, with the help of prescription pills, take a toll on her as her hunt for Ali and much needed answers continues, teleporting her into the world of 1940s film noir.

Emily, Hanna and Spencer are concerned for Aria as they watch their friend crumble after learning shocking news about Ezra. Not knowing what is true or who to trust, Aria goes looking for answers, not wanting to believe this revelation to be true. Spencer is concerned for Aria, but she is not doing so well herself. Trying to prove to her parents and Toby that she can kick the habit on her own, Spencer has to be careful because one misstep could send her to rehab. Can Spencer really rein it in, or will her constant curiosity and drive be her undoing? Meanwhile, Paige has had enough with Emily's secrets and is determined to stop it.

It is a rough time for all of the Liars as Spencer is reeling about the memories from her "lost summer," Aria is still nursing a broken heart, Emily is reeling from Paige's betrayal and Hanna unsuccessfully attempts to wade back into the dating pool. But as each girl tries to deal with her individual issues, they must focus their attention on their suspicions surrounding Mrs. DiLaurentis. Assuming that Mrs. D knows more about Ali and the night she went missing, girls decide to help out at her charity bridal fashion show to gain access to the DiLaurentis house to search for answers. Meanwhile, Ella and Jason return to Rosewood, each with something to hide.

The PLLs must dodge their dreaded nemesis, "A," while navigating a world with Alison back in it.

The liars are forced to live through Ali's latest lie; Hanna and Aria have loose ends with two people who know about Ali's story; Spencer and Emily try to uncover Jason's whereabouts in New York.

The liars keep their distance from Ali; Spencer finds out Peter has a little more than something to do with Jessica's murder; Aria wants to know more about Shana.

Ali returns to Rosewood High and hopes to help heal the damage she did years ago, but not if Mona and her army have anything to say about it; Caleb and an old foe return to Rosewood.

With 'A' back in their lives, the girls are determined more than ever to know his/her identity. While Ali prepares to run away from Rosewood, Hanna faces a challenge in her relationships. Detective Tanner digs deeper into the death of Shana.

Emily is on the hunt to find out the truth about Alison, seeking unlikely help from Ezra Fitz for information about Cyrus and Alison's connection. Meanwhile Melissa's secret is finally revealed, Hanna asks for Spencer's and Toby's help with Caleb and his drinking problem.

The girls join forces with Mona to figure out why Ali reached out to the police. Alison's actions put Spencer in the cross-hairs of Bethany's murder investigation. Mona reveals the truth about Ali, resulting in an aching loss.

It is Christmas time and all of the liars are planning on having a great time at the Ice ball, but 'A' has other plans.

The liars get trapped in an abandoned house with A on their trails they struggle to get out. Meanwhile Toby, Spencer, and Caleb try to find out who killed Mona.

Emily and Paige apply for the same job; Hannah is visited by Mrs. Grunwald; Ali returns to work; Spencer and Aria pursue answers from the doctor who delivered Mary's baby.

Hanna goes rogue to prove that Noel is Über A; Emily unexpectedly turns to Paige for comfort; Jason and Aria look into Mary's past.

The liars face off with their enemies in a chaotic fight that ends fatally; One liar learns a secret about her past; Another discovers something about her future.

With more secrets being uncovered, the liars all have something to deal with; A.D sets a game for the liars.

Emily butts heads with teenager Addison; Spencer confronts her mother; Aria confides in Holden; Jenna stirs up trouble when she returns.

Ali's turn at the game forces her to face a monumental personal decision; Hanna and Spencer run into a familiar face with a shocking secret.

After being blackmailed by A.D, one of the liars begins to pass to the dark side to protect those closest to her.