Pretty Little Liars: Original Sin Show Summary, Upcoming Episodes and TV Guide

The friends work together to uncover Imogen and Tabby's assailant during the Annual Thanksgiving Millwood High Blood Drive. Later, Sidney confronts Tabby about her secrets.

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.

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

In the wake of Spirit Week, Imogen unearths long-buried truths on her path to unmask the mysterious 'A.' After Sheriff Beasley closes in, Noa, Faran, and Mouse weigh their options, while Tabby works to recover vital evidence.

In 1999, a group of friends is rocked by the sudden death of one of their own. Twenty-two years later, their daughters are pushed together by a mysterious foe.