Pretty Little Liars: Season 6

The one-hour drama follows four teenage girlfriends -- Aria (Hale), Emily (Mitchell), Hanna (Benson) and Spencer (Bellisario) -- who each began receiving threatening messages from someone named "A" one year after the supposed murder and disappearance of their friend Alison (Pieterse), a notorious queen bee. Somehow "A" knew their most private secrets; things the girls hoped would remain hidden. As the torment and manipulations continued, destroying relationships and affecting their loved ones, the tension continued to build as Aria, Emily, Hanna and Spencer discovered strengths they didn't know they had and experienced scares they could never have imagined -- scares which didn't end even when Alison returned and their frenemy -- and suspected "A" accomplice Mona (Parrish) -- was thought to be murdered....

As the sixth season begins moments after the season five finale, Aria, Emily, Hanna, Spencer and Mona are trapped outside the "dollhouse" where their tormentor, Charles, has been keeping them -- with nowhere to run. Angered by their attempted escape, Charles' games take a more demented, darker turn. As the girls struggle to survive, Ezra (Harding), Caleb (Blackburn) and Toby (recurring guest star Keegan Allen) continue the fight to find the girls with or without Rosewood Police Department's help. Charles' story begins to come together, with the Liars eventually solving the puzzle and unmasking Charles, finally putting an end to the "A" game.

In addition to Allen, this season features recurring guest stars Drew Van Acker (Devious Maids) as Jason DiLaurentis; Nia Peeples (Fame; Walker, Texas Ranger) as Pam Fields; Elizabeth McLaughlin (The Clique) as Lesli; Travis Winfrey (Single Ladies) as Lorenzo; Dre Davis as Sara; Nathaniel Buzolic (The Originals, The Vampire Diaries) as Dean; Leslie Fera (CSI: Miami) as Veronica Hastings; Jim Abele (24) as Kenneth DiLaurentis; and many others.

Developed by I. Marlene King (Just My Luck, If These Walls Could Talk, Now and Then), Pretty Little Liars is executive produced by King along with Oliver Goldstick (Lipstick Jungle, Ugly Betty), Leslie Morgenstein (The Vampire Diaries, The Originals, Gossip Girl) and Joseph Dougherty (thirtysomething, Saving Grace, Judging Amy). The series is based upon the book by Sara Shepard.