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.
Melissa reveals her knowledge of Alison's disappearance to Spencer; Emily seeks Ezra's help.
The Liars try to prevent Alison from sending an innocent man to jail; Hanna seeks a normal life.
Hanna's drinking gets out of control; Emily looks for information linking Alison to Noel.