Pretty Little Liars: Original Sin - Season 1

20 years after a series of tragic events that almost torn the town of Millwood apart, both the young and old generation of Millwood must face the consequences of their past when an unknown assailant seems to know an awful lot about their secretive history. (imdb)

Imogen and her new friends plot revenge on their common nemesis, while Karen and her twin sister Kelly hatch plans of their own. (imdb)

As Millwood deals with the aftermath of recent events, Imogen uncovers secrets to unmask "A." Beasley gets closer to the truth, Noa weighs her options, and Tabby tries to retrieve some evidence. (imdb)

After their punishment comes to an end, the girls cement their friendship when Imogen needs them most. Meanwhile, Noa find herself in A's cross hairs. (imdb)

Desperate to keep her mother's house, Imogen throws a Halloween party to raise cash. Unfortunately, the presence of an unwanted house guest casts a shadow over the celebrations. (imdb)

As Imogen and Tabby dig into the mystery surrounding Angela Waters, Faran deals with the scars of her past. (imdb)

As the Millwood carnival approaches, Mouse and Tabby each struggle with secrets, and Noa notices Shawn isn't himself. Meanwhile, Imogen considers her baby's future, and Faran confronts everything that's been plaguing her. (imdb)

The friends attempt to get to the bottom of one mystery, while Imogen pursues answers to another; a much-needed girls' night prompts Sidney to confront her daughter about a long-held secret. (rottentomatoes.com)

Imogen turns to her estranged father for help; Tabby considers an unexpected suspect; Mouse deals with the aftermath of a lie, as Faran attempts to protect Kelly from an increasingly unhinged Sheriff Beasley. (rottentomatoes.com)

An already vengeful "A" doubles down; as Tabby and Imogen work to confirm a hunch, the members of the group confront their mothers about what really happened on New Year's Eve 1999, and how it led to them being tormented by a masked assailant. (rottentomatoes.com)