Pretty Little Liars: Original Sin Series 1 Episodes Available now
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Chapter One: Spirit Week
1/10 Twenty years on, an unknown assailant seems to know all about Millwood's secret history.
Chapter Two: The Spirit Queen
2/10 Imogen and her new friends plot revenge on their common nemesis.
Chapter Three: Aftermath
3/10 As Millwood deals with the aftermath of recent events, Imogen tries to unmask 'A'.
Chapter Four: The Fe(Male) Gaze
4/10 The girls cement their friendship when Imogen needs them most.
Chapter Five: The Night He Came Home
5/10 Imogen throws a Halloween party to raise cash.
Chapter Six: Scars
6/10 Imogen and Tabby dig into the mystery surrounding Angela Waters.
Chapter Seven: Carnival of Souls
7/10 As the Millwood carnival approaches, Mouse and Tabby both struggle with secrets.
Chapter Eight: Bad Blood
8/10 The friends try to get to the bottom of one mystery while Imogen pursues another.
Chapter Nine: Dead and Buried
9/10 The results of the group's clandestine blood drive push Tabby towards a new suspect.
Chapter Ten: Final Girls
10/10 The liars race to uncover the link between Angela Waters's death and the mysterious A.