Melissa reveals her experience from the night Ali died.
Melissa (recurring guest star Torrey DeVitto) finally tells Spencer what she knows regarding the night Ali disappeared. But what is Spencer supposed to do with the knowledge? Knowing something is off about Alison's story, Emily is on the hunt for answers of her own. She enlists Ezra's help in finding out more about Cyrus and his past connection to Alison. Meanwhile, Hanna asks Spencer and Toby (recurring guest star Keegan Allen) for help with Caleb's drinking problem.
Melissa's secrets are finally revealed and Hanna demands the truth about Ravenswood from Caleb. Plus, Emily is on the hunt for answers of her own and enlists Ezra's help.
The PLLs begin to question Ali's motives.
The pressure is on for Alison to identify the man police have in custody for her kidnapping, but the Liars know if she does it would be sending an innocent man to prison and possibly walking right into an "A" trap. With Emily trying to convince Ali not to play into "A's" hand, Spencer comes up with a plan B, in case Ali decides to make the wrong decision. Meanwhile, fed up with all of the Ali drama, Hanna tries to lead a "normal" teenage life.
Alison's games may have pushed her friends too far when an innocent man's life is put in the balance, so Spencer comes up with a plan B.
Ella and Zac prepare for their engagement party.
Hanna continues down her boozy path, with the help of Caleb, but her friends can no longer stand by and watch Hanna self-destruct. After her last encounter with Hanna, Aria starts to take note of Zack (recurring guest star Steve Talley) and wonders if Hanna - while drunk - was telling her the truth. Meanwhile, Emily tries to find information linking Alison to Noel (recurring guest star Brant Daugherty) and Spencer makes a surprising discovery at the eye doctor. Recurring guest stars include Chade Lowe as Byron, Holly Marie Combs as Ella, Tammin Sursok as Jenna and Chloe Bridges (The Carrie Diaries) as Sydney.
Hanna hits rock bottom, Emily tries to find information linking Alison to Noel (BRANT DAUGHERTY), Spencer makes a surprising discovery and Aria takes note of Zack (STEVE TALLEY).
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