Chuck Hittinger

After much planning, the day of Alison's memorial is around the corner and the girls are ready to say their good-byes. But when Alison's brother, Jason DiLaurentis (guest star Parker Bagley – A Nightmare on Elm Street [2010]), arrives, Spencer, Aria, Hanna and Emily quickly learn that saying good-bye is at the bottom of his list. As Jason takes over, and Detective Wilden (recurring guest star Bryce Johnson) returns, will the girls be able to celebrate Alison's life in the peaceful and positive way they were hoping for? Meanwhile, Hanna is forced to deal with a situation at home that could really cramp her "It girl" status.

The circumstances surrounding Alison's disappearance continue to haunt Aria, Emily, Spencer and Hanna as questions arise about the night she went missing. To complicate matters, the return of Jenna Cavanaugh (recurring guest star Tammin Sursok – Home and Away, The Young and the Restless) to Rosewood makes the girls face an unpleasant past and an incident that sealed their friendship forever. Can the girls face what has taken place in their past, especially since "A" won’t let them forget? Meanwhile temptation is everywhere as Aria tries her hardest to stay away from Ezra and Spencer won't shy away from her sister's fiancé, Wren (recurring guest star Julian Morris – 24, ER).

"The past will come back to haunt you" — this saying has never been more true than for Aria, Spencer, Hanna and Emily. As the girls try to pay tribute to Alison's memory, the four friends are faced with unresolved issues. Aria has an unsettling encounter with Byron's old mistress, Meredith (recurring guest star Amber Borycki – The Big Bang Theory, Harper's Island). Emily is forced to see Toby Cavanaugh (recurring guest star Keegan Allen) in a new light. Spencer is reeling in the wake of someone with a vengeance and Hanna is desperate to have her boyfriend forget the "old" Hanna. With "A" taunting them every step of the way, can the girls forge ahead and leave the past behind? Meanwhile, Detective Wilden (recurring guest star Bryce Johnson – Popular) uses his new connection to Hanna and Ashley to his benefit. But will he get the answers he's looking for by making himself at home in the Marin household?

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, D.C. Hanna is having a hard time finding a job to help her family's financial situation; will she be able to refuse when "A" has a job for her? Emily can only think of Maya and is so desperate to speak to her that she enlists the help of Caleb (recurring guest star Tyler Blackburn – Rockville CA), the new bad boy at school. Meanwhile, Aria's former babysitter, Simone (guest star Alona Tal – Supernatural), comes back to town for a surprise visit, but what should be a happy reunion quickly becomes a nightmare for Aria when Simone sets her sights on Ezra. And, as an important piece of property goes missing, Spencer finds being in close quarters with her new brother-in-law, Ian (recurring guest star Ryan Merriman), more difficult than ever.

Trying to ignore "A" backfired for the girls and now they must pay the penalty. Whether it is a family in crisis, parental praise for an undeserved honor looming over their head or wearing totally unfashionable scrubs while working off a debt — the girls must deal with it all. And on top of that the lipstick message from "A" is still haunting them. Meanwhile, the girls must also deal with typical teenage drama — the boy kind. A new guy arrives and pushes the status quo, a secret love is tested, a new romance blooms and an old romance floats in the grey area.