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

Emily, Spencer and Hanna try to adjust to the new normal; Kenneth searches for Jessica

Alison struggles with the death of her mother, as the Liars try to navigate through her new lie

Alison attempts to regain her position as leader of the gang upon her return to Rosewood High

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.''

Aria searches for information on a patient; Spencer borrows Ezra's spy equipment

Hanna is pushed down a dark path after Alison moves in; Aria fails in her duties as maid of honor

Hanna's drinking gets out of control; Emily looks for information linking Alison to Noel

The Liars try to prevent Alison from sending an innocent man to jail; Hanna seeks a normal life

Melissa reveals her knowledge of Alison's disappearance to Spencer; Emily seeks Ezra's help

Aria, Emily, Hanna and Spencer feel trapped and search desperately for a way out of a bad situation

A Halloween-themed ode to viewers features interviews with cast and crew, fan questions and visits from dearly departed characters

The girls are not feeling merry at Christmas because Spencer's murder charge looms over them. Things improve though after they see an opportunity to gather evidence to clear her name

The Liars try to prove that Alison was involved in Mona's death; Aria worries about her future

Spencer and Toby are at odds while Emily and Aria struggle with situations that are out of their control

Secrets abound for Aria, Hanna and Spencer while Emily tries to let go of Paige

Hanna refuses to let "A" frame her for Mona's murder; Spencer's actions put Toby in a bind

Mona's friend comes to town to pay her respects

Aria hopes Andrew can be her tutor; Spencer helps Jonny with a new project

Hanna enters a beauty contest and turns to Emily for help; Aria asks Andrew to keep an eye on Mike

The girls scramble for evidence as Alison considers a deal. Spencer has a night out on the town in London

Ali considers a plea deal, but it incriminates someone else, so the girls try to help her and Mike, as well as themselves. Elsewhere, Spencer unwinds while on a night out in London

Testimony at Alison's trial reveals a plethora of lies; Spencer, Aria, Emily, and Caleb follow a string of clues in hope of uncovering information that will clear Hanna

The prosecution calls a surprise witness in Alison's trial; the girls hunt for last-minute evidence

Shocking secrets come to light for Aria, Emily, Hanna and Spencer as the biggest clue to the "A" mystery is revealed