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.

Pretty Little Liars: Original Sin Season 1 Episodes...

• s01e01 - Chapter One: Spirit Week
• s01e02 - Chapter Two: The Spirit Queen
• s01e03 - Chapter Three: Aftermath
• s01e04 - Chapter Four: The (Fe)male Gaze
• s01e05 - Chapter Five: The Night He Came Home
• s01e06 - Chapter Six: Scars
• s01e07 - Chapter Seven: Carnival of Souls
• s01e08 - Chapter Eight: Bad Blood
• s01e09 - Chapter Nine: Dead and Buried
• s01e10 - Chapter Ten: Final Girls

Pretty Little Liars: Original Sin Show Summary

Twenty years ago, a series of tragic events almost ripped the blue-collar town of Millwood apart. Now, in the present day, a group of disparate teen girls - a brand-new set of Little Liars - find themselves tormented by an unknown Assailant and made to pay for the secret sin their parents committed two decades ago... as well as their own.