One year after the mysterious disappearance of Alison Dilaurentis, her friends believe their secrets are safe forever, but the truth may be only one text away.

Flashbacks from Aria, Spencer, Hanna and Emily's past occur when blind girl, Jenna, shows up in Rosewood. Aria tries to stay away from her English teacher, Ezra Fitz. Emily and Maya share a short kiss.

Aria has an unsettling encounter with Meredith; Emily is forced to see Toby in a new light; Spencer is reeling in the wake of a vengeful Melissa.

The liars take matters into their own hands and try to put a stop to "A" by blocking all unknown users, but their problems are far from over.

Trying to ignore "A" backfired for the liars and now they must pay the penalty as they deal with typical teenage drama - the boy kind.

The homecoming dance is supposed to be a time for fun and making memories, but for the liars, disturbing secrets threaten to ruin their perfect night.

After the homecoming dance, the liars try to sort out the devastation; "A" isn't the only one sending Aria texts as tensions rise in the Montgomery household..

Last-minute preparations for Alison's memorial get derailed when her brother, Jason DiLaurentis arrives back in Rosewood, and saying goodbye is at the bottom of his list.

The liars are trapped at school as a bad storm brews, and tensions run high; Byron leans on Ashley for advice on parenting as his relationship with Ella takes a bad turn.

The liars go glamping for Mona's birthday as A's threats escalate and the FBI arrives in Rosewood. But not even a mani-pedi can lift the girls' spirits when the evening takes a dangerous turn.

Moments after Hanna is hit by a car, the liars' world is turned upside down, as "A" is no longer content playing a game of cat and mouse.

As the liars try their best to support Hanna's release from the hospital, they each have their own surprises to deal with.

As Noel steps up his pursuit of Ezra, him and Aria start to feel like there may be no way out; Pam's perceived tolerance of Maya comes to a screeching halt; Spencer must handle the return of happy newlyweds Melissa and Ian; "A" has Hanna jumping through old habit hoops with regard to the stolen money.

The school's dance-a-thon gives the liars more than sore feet; Aria's old babysitter, Simone, comes to visit and sets her sights on Ezra.

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.

As tensions rise, the girls ponder the true nature of evil; Aria views the school play as an opportunity to get closer to Ezra, but will her plan backfire?

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.

In the season one finale, the girls go to an unlikely source for help to put an end to "A" and the mystery surrounding their friend. Can they really stop "A" once and for all?

The liars face the fallout from what happened with Ian at the church, their parents have them talk with a therapist; Caleb returns to see Hanna; Spencer is told Toby is off-limits.

Emily struggles with her family's impending move to Texas; Spencer tries to be supportive of Toby's new plans; Ezra's begs Aria to work things out, but is there anything left to say?

The liars try to keep their distance from each other; Spencer notches up her suspicions about what is going on in the DiLaurentis house, with Jason moving back in.

Hanna helps Lucas with his date, until Caleb is thrown into the mix; Aria has a chance encounter with Jason, which brings back some surprising memories.

With the shocking news about Ian making the rounds through Rosewood, the liars and their families all try to cope with the outcome; Hanna gets a surprising look into Caleb's life after his shady foster mother surfaces.

On the eve of the Rosewood Charity Fashion Show, the liars are surprised with Jessica DiLaurentis' return to town and her request that they participate in the show on Alison's behalf; Spencer quickly learns that Mona has stepped in and taken charge of running the event.

The girls are uneasy as each confronts complicated matters. Ezra and Jason are invited to a dinner party at the Montgomerys and vie for Aria's attention.

When Emily's dad surprises her before a big swim meet, the pressure sends her to the hospital; Spencer and Aria use the opportunity to dig for clues about Alison's death.

Spencer is determined to find out what Jason is hiding at his house; Aria can't seem to get Jason off her mind for a different reason; Hanna helps Caleb with a difficult decision about his family.

Aria tries to process Spencer and Emily's news about Jason while dealing with her feelings for him; Hanna tries to be nice to her future stepsister Kate; 'A' turns up the heat on Emily by trying to push her to breaking point.

The liars finally reveal the torment "A" has put them through to the one person they trust outside their group, Dr. Anne Sullivan, but could she be next on "A's" target list?

All is not what it seems as "A" sends the girls on a hunt to destroy lives. Can the liars go through with their given tasks in order to save one, or will they ignore "A" to save those around them from being hurt?

It's the Halloween before Alison went missing and the friends hope to score an invite to Noel's Halloween party; Jenna challenges Ali for Queen Bee dominance; Aria learns a shocking revelation about Byron.

A month has passed since the liars were arrested and they're at each others' throats and Emily has been iced out completely. But what could have divided them so severely, has "A" finally won the game of divide and conquer?

The liars, realizing that "A" is not acting alone and their helper may be closer than they think, decide to enlist Caleb's hacking skills.

With Lucas missing and questions surrounding what happened out on the lake, Hanna can barely catch her breath; Spencer follows a lead about "A" which guides her to an unexpected place and revelation.

Toby continues to pursue Spencer, knowing that she is keeping something from him; Hanna begs the other girls to stop using Caleb to help with their search; Aria is desperate to save her relationship with Ezra.

After speaking to her friends about Caleb, Hanna feels they are giving her the cold shoulder; Emily hopes to re-introduce Maya to her mother.

Aria continues to question Holden on what exactly he is up to during their "date nights"; Hanna tries to figure out the latest situation with Kate; Emily gets help from an unlikely source to get back on the Rosewood swim team.

Hanna's worst nightmare comes to fruition when Caleb becomes a target of "A" and his computer is in possession of the cops; Aria learns what Holden's been keeping a secret.

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.

With fathers looking to make amends and daughters trying to keep the peace, Rosewood's annual Father-Daughter Dance looks to be anything but fun; Ashley continues her hunt to find answers about what is going on with Hanna with help from a surprising source.

The liars are on the quest for answers of what Alison knew before she died; Jason drops off a bag of Alison's personal items that could be more than just a bag of junk; Toby's return to Rosewood brings a surprise reunion that ends dangerously.

The hunt for answers about what Ali knew leads Aria, Emily, Hanna and Spencer to a rundown doll hospital that holds more than just secrets.

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

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..

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?

Hanna worries her mother is keeping a dangerous secret, which leads to an uncomfortable meeting with Detective Holbrook; Melissa returns to Rosewood.

Spencer and Emily visit a nearby college, but they have different agendas for their time on campus. Hanna is frantic after another horrifying discovery among her mom's things.

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.

As Hanna's downward spiral continues, an unfortunate incident with Zack threatens to strain her friendship with Aria. Spencer and Emily dig deeper into Bethany's relationship with Mrs. Dilaurentis.

Spencer confronts Caleb regarding Hanna's issues; Aria opens up to Ella and questions her marriage to Zack; Emily and Spencer close in on Noel's motives and a call from detective Tanner has Alison perplexed.

All eyes are on Alison as she struggles with her response to Cyrus' confession. Melissa hints at knowing the truth and warns Spencer to keep away from Ali. Aria mulls over Spencer's plan of letting everything out in the open with Tanner.

Alison's trial comes to a close when the prosecution calls a surprise witness; The liars race to find someone or something that can prove Ali's innocence; Mike becomes a target of "A" when it looks like he might be called to testify.

The girls struggle with the lasting after effects of their time spent in the dollhouse.

Aria may not get a chance to see her work on display. Hanna wants to return her scholarship money. Rosewood High considers banning the girls from prom.

As the girls attend their senior prom, A's threats escalate and the girls get one step closer to finding out the truth about Charles DiLaurentis.

After years of torment, the liars will finally come face to face with their tormenter, and uncover the puppeteer behind the hoodie.

Hanna admits the truth; Aria and Emily look for answers about Ezra; Spencer and Caleb try to track down the new threat; New love interests emerge and old ones resurface.

Convinced that Sara Harvey is behind the new threats, the liars work together to get answers; Caleb and Hanna make a plan to fight back against the new stalker.

The liars investigate a new suspect; Aria tells Ezra the truth about the book; Spencer and Caleb deal with a media leak; Emilly is harassed by the stalker.

Secrets come tumbling out as the ultimate endgame comes to light and A.D. is revealed.

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.

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.

Spencer confronts Caleb regarding Hanna's issues; Aria opens up to Ella and questions her marriage to Zack; Emily and Spencer close in on Noel's motives and a call from detective Tanner has Alison perplexed.

Aria may not get a chance to see her work on display. Hanna wants to return her scholarship money. Rosewood High considers banning the girls from prom.

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.

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.

After the homecoming dance, the liars try to sort out the devastation; "A" isn't the only one sending Aria texts as tensions rise in the Montgomery household..

As the girls attend their senior prom, A's threats escalate and the girls get one step closer to finding out the truth about Charles DiLaurentis.

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