Pretty Little Liars: Original Sin Episodes Available now
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![](https://ichef.bbci.co.uk/images/ic/320x180/p0d8d8gb.jpg)
Chapter One: Spirit Week—Series 1
1/10 Twenty years on, an unknown assailant seems to know all about Millwood's secret history.
![](https://ichef.bbci.co.uk/images/ic/320x180/p0d8d8xl.jpg)
Chapter Two: The Spirit Queen—Series 1
2/10 Imogen and her new friends plot revenge on their common nemesis.
![](https://ichef.bbci.co.uk/images/ic/320x180/p0d8d92w.jpg)
Chapter Three: Aftermath—Series 1
3/10 As Millwood deals with the aftermath of recent events, Imogen tries to unmask 'A'.
![](https://ichef.bbci.co.uk/images/ic/320x180/p0d8d983.jpg)
Chapter Four: The Fe(Male) Gaze—Series 1
4/10 The girls cement their friendship when Imogen needs them most.
![](https://ichef.bbci.co.uk/images/ic/320x180/p0d8d9ms.jpg)
Chapter Five: The Night He Came Home—Series 1
5/10 Imogen throws a Halloween party to raise cash.
![](https://ichef.bbci.co.uk/images/ic/320x180/p0d8dbnj.jpg)
Chapter Six: Scars—Series 1
6/10 Imogen and Tabby dig into the mystery surrounding Angela Waters.
![](https://ichef.bbci.co.uk/images/ic/320x180/p0d8dbym.jpg)
Chapter Seven: Carnival of Souls—Series 1
7/10 As the Millwood carnival approaches, Mouse and Tabby both struggle with secrets.
![](https://ichef.bbci.co.uk/images/ic/320x180/p0d8dcgt.jpg)
Chapter Eight: Bad Blood—Series 1
8/10 The friends try to get to the bottom of one mystery while Imogen pursues another.
![](https://ichef.bbci.co.uk/images/ic/320x180/p0d8ddlb.jpg)
Chapter Nine: Dead and Buried—Series 1
9/10 The results of the group's clandestine blood drive push Tabby towards a new suspect.
![](https://ichef.bbci.co.uk/images/ic/320x180/p0d8dhhv.jpg)
Chapter Ten: Final Girls—Series 1
10/10 The liars race to uncover the link between Angela Waters's death and the mysterious A.