Tired of being harassed by 'A', the girls decide to put a stop to the anonymous emails and text messages by blocking all unknown users. But the friends' problems are far from over.

The homecoming decorating committee is knee-deep in balloons, and girls are jockeying for position to be the queen, while four friends from Rosewood just try to stay afloat.

Moments after Hanna is hit by a car, the girls' world is turned upside down. 'A' is no longer content to play a game of cat and mouse, and things take a far more precarious turn.

Hanna's return home from the hospital should be a joyous event, but being stuck in a wheelchair and feeling haunted by 'A' makes it feel more like a Hitchcock nightmare than a proper homecoming.

As the school gets ready for the dance-a-thon, Aria, Emily, Hanna and Spencer have more on their minds than just raising money for the school trip to Washington DC.

Emily gets a lifeline, Aria faces Mr Fitz’s farewell, Hanna confronts her father, and Spencer is troubled by Toby’s treatment, Melissa’s lies, plus Alison’s brother.

Reaction to a dug-up item raises Spencer’s suspicions, an awkward dinner is disturbed at Aria’s, while Emily finds rooming with Hanna a pain.

The harassed foursome face the fact they need outside help, though some problems stay strictly in the family.

The fractured foursome endure their legal punishment plus the pain of shunning loved ones. But changes are coming.

One of Aria's past indiscretions is fodder for a new "A." and Emily recalls a crucial event from the night she lost her memory.

A new clue could lead the girls down the wrong path. Emily remembers something new from the other night but the recollection suggests a very surprising suspect.

A battle of the brains stresses Spencer, Aria learns of reasons to suspect her father of foul play, Hanna confronts Lucas, and Emily gets a fright in the woods.

Hanna worries that her mother is keeping a dangerous secret and is determined to protect her at all costs, which leads to an uncomfortable meeting with Detective Holbrook.

Holbrook's partner, Lt Tanner, comes to town, intensifying their investigation into the Liars and their possible connection to Wilden's death.

An intriguing riddle from "A" has the Liars hitting the road and heading to Ravenswood, where they are surrounded by some familiar faces.

Now that Hanna has shared with Aria, Emily and Spencer that she has Ali's diary, the girls hope it can shed light on their many questions.

Aria watches over Ezra at the hospital, while Alison and the others set a trap for "A."

Alison returns to Rosewood High and attempts to repair the damage she inflicted years earlier.

The girls look out for Alison's safety after she is spooked by a recent Rosewood "accident.''

The girls may have gotten out of the Dollhouse but what happened to them during their time of captivity has lasting effects. With worried loved ones watching over them, the PLLs are home and trying to heal, with not much success. Even with suspected tormentor Andrew in custody, Aria, Emily, Hanna and Spencer fear they are far from safe.

Meanwhile, Alison must deal with her past indiscretions and her notoriety around Rosewood.

The girls’ lives have been turned upside down by their captivity and each one of them is looking for answers to make sense of their ordeal. Aria focuses on Andrew by trying to figure out who this boy really is while Emily tries to connect with a new friend. In true Spencer fashion, she is on a mission to get answers about Charles from Ali and Jason. Hanna wants to bring the four friends back together so they can move past what happened in the Dollhouse.

Meanwhile, Alison is no longer the queen bee/mean girl she once was – but who is she now? A new friend tries to help her find the courage to start anew and find the “new” Alison.

Jenna returns to Rosewood and befriends another one of the Liars’ enemies, making her the PLL’s number one suspect for Uber A. In order to leave the psychiatric hospital, Ali must be released into the care of a relative, leaving her under the suspicious watch of Mary Drake. Spencer enlists Hanna’s help to search for Caleb as he’s missing in action. Aria and Emily stumble upon a secret apartment they hope will lead them to more answers.

The Rosewood PD turn up the heat on the Liars, causing loved ones to try and close ranks. Aria’s recent collaboration with A.D. comes to the attention of a surprising source. A.D. presents the PLLs with a choice designed to drive a wedge between them. Meanwhile, everyone tries to find a bit of happiness before all hell breaks loose. Toby returns to Rosewood, and Aria makes a horrifying discovery.