Every season of Pretty Little Liars: Original Sin ever, ranked from best to worst by thousands of votes from fans of the show. The best seasons of Pretty Little Liars: Original Sin!

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.

Chapter One: Spirit Week

As Imogen and her newfound friends plot revenge against a mutual nemesis, Karen and her twin sister Kelly hatch an insidious plan of their own.

Chapter Two: The Spirit Queen

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.

Chapter Three: Aftermath

After their punishment comes to an end, the girls cement their friendship when Imogen needs them most.

Chapter Four: The (Fe)male Gaze

Desperate to keep her mother’s house, Imogen throws a Halloween party to raise cash.

Chapter Five: The Night He Came Home

As Imogen and Tabby dig into the mystery surrounding Angela Waters, Faran deals with the scars of her past. After Shawn confronts Marjorie, Noa questions her relationship with her mother, while Mouse spots a familiar face on her first date.

Chapter Six: Scars

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.

Chapter Seven: Carnival of Souls

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.

Chapter Eight: Bad Blood

Despite coming clean about “A,” the friends find their troubles are far from over – especially as the results of the group’s clandestine blood drive push Tabby towards a new suspect.

Chapter Nine: Dead and Buried

As “A” doubles down, the friends must work quickly to uncover the link between Angela Waters’ death, their mothers, and their mysterious foe… before it’s too late.

Chapter Ten: Final Girls

The PLLs await the results of A's trial and a much-needed break – only to be cursed with a fate worse than death ... summer school.

Chapter Eleven: Spookyspaghetti.com

Heeding Dr. Sullivan's advice, the PLLs make the most of their summers. Meanwhile, Imogen forges a new identity away from her closest friends.

Chapter Twelve: Summer Lovin

As the PLLs plan Mouse's surprise sixteenth birthday party, Tabby and Imogen face boy problems, Noa clashes with Jen and Faran spills her secret.

Chapter Thirteen: Sweet Sixteen

Still shaken from her encounter with Bloody Rose, Mouse searches for the real Rose Waters. Meanwhile, Imogen keeps tabs on Dr. Sullivan, Tabby works on a new short, Noa takes a much-needed day off, and Faran’s strength is put to the ultimate test.

Chapter Fourteen: When a Stranger Calls Back

A disturbing discovery causes the PLLs to doubt Dr. Sullivan. Meanwhile, during Tabby's movie marathon, Noa is forced to make a brutal decision.

Chapter Fifteen: Friday the 13th

After discovering that Kelly's church is using her former home for their disturbing "Hell House", Imogen springs into action, while Mouse and Ash plan a Pride pool party in protest. Later, the PLLs' plan to freak out the faithful takes a frightening turn.

Chapter Sixteen: Hell House

Still shaken from Hell House, Imogen learns about Dr. Sullivan's secret ties to A, while the PLLs set out to uncover Bloody Rose's identity.

Chapter Seventeen: The Bogeyman

The PLLs take a final stab at their list of suspects, and through a harrowing night will discover the identity of Bloody Rose Waters once and for all.

Chapter Eighteen: Final Exam

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 finds 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.

The Best Seasons of Pretty Little Liars: Original Sin

The Best Seasons of Pretty Little Liars: Original Sin

Season 1

Season 2