Shocking secrets come to light for the Liars as the biggest clue to the "A" mystery is revealed.
The prosecution calls a surprise witness in Alison's trial; the girls hunt for last-minute evidence.
Spencer, Aria, Emily and Caleb hunt for information that will clear Hanna.
Alison is offered a plea bargain if she names one of the Liars as her accomplice.
The Liars work to protect Mike and get Alison released from jail; Spencer travels to London.
Hanna enters a beauty contest and turns to Emily for help; Aria asks Andrew to keep an eye on Mike.
Aria hopes Andrew can be her tutor; Spencer helps Jonny with a new project.
Mona's friend comes to town to pay her respects.
Hanna refuses to let "A" frame her for Mona's murder; Spencer's actions put Toby in a bind.
Aria attempts to summon the courage to tell Ezra the truth; Hanna covers for Ashley.
Toby is conflicted when a surprising piece of evidence arrives at the police department.
The Liars try to prove that Alison was involved in Mona's death; Aria worries about her future.
The girls try to clear Spencer's name; Alison encounters a ghostly presence.
An ode to fans with a Halloween Twist!
Aria, Emily, Hanna and Spencer feel trapped and search desperately for a way out of a bad situation.