Episode Thirteen takes them to every ghost hunter's holy grail: the Paranormal Research Foundation. This brooding, derelict mansion holds secrets and clues about bizarre experiments that took place there in the 1970s. It's also famously haunted, and the team hopes their scientific techniques and high tech gear will prove it. But as the house begins to reveal itself to them, proof of an afterlife might not be everything Matt dreamed of.

These people will give anything for the idols they worship, be they rock stars, actors or authors. Or even serial killers. Lori is just such a fanatic. Her obsession is with Edmund Cox, a man of sadistic cruelty who butchered more than 20 women. She’s gone so far as to forge a relationship with him, visiting him in prison and sending him letters on a regular basis. She will do anything to get close to him, so when he gives her a task, she eagerly accepts it. She has no idea of the horror that awaits her.

Mia and Finn are busy turning a derelict house into their dream home when Mia unexpectedly falls pregnant. But just when they think the house is ready, Mia discovers a shocking message scored into a skirting board: I WILL SAVE THEM FROM THE ATTIC. Following the clue up into the eaves, the couple make a gruesome discovery: their home was once a real-life murder house, with the evidence still concealed within the four walls.

Eve has a good life. She wakes up each day, kisses her husband Nate, and heads off to teach math at the local high school. All is as it should be. Except… Last year, Caseham High was rocked by a scandal involving a student-teacher affair, with one student, Addie, at its center. But Eve knows there is far more to these ugly rumors than meets the eye. Addie can’t be trusted. She lies. She hurts people. She destroys lives. At least, that’s what everyone says. But nobody knows the real Addie. Nobody knows the secrets that could destroy her. And Addie will do anything to keep it quiet…

In her small hometown, librarian Ruth Cornier has always felt like an outsider, even as her beloved father rains fire-and-brimstone warnings from the pulpit at Holy Fire Baptist. Unfortunately for Ruth, the only things the townspeople fear more than the God and the Devil are the myths that haunt the area, like the story of the Low Man, a vampiric figure said to steal into sinners' bedrooms and kill them on moonless nights. When a skull is found deep in the swamp next to mysterious carved symbols, Bottom Springs is thrown into uproar.

Patricia Campbell's life has never felt smaller. Her ambitious husband is too busy to give her a goodbye kiss in the morning, her kids have their own lives, her senile mother-in-law needs constant care, and she's always a step behind on thank-you notes and her endless list of chores. The one thing she has to look forward to is her book club, a close-knit group of Charleston women united by their love of true crime and paperback fiction. At these meetings they're as likely to talk about the Manson family as they are marriage, motherhood, and neighborhood gossip.

Naomi Shaw used to believe in magic. Twenty-two years ago, she and her two best friends, Cassidy and Olivia, spent the summer roaming the woods, imagining a world of ceremony and wonder. They called it the Goddess Game. The summer ended suddenly when Naomi was attacked. Miraculously, she survived her seventeen stab wounds and lived to identify the man who had hurt her. The girls’ testimony put away a serial killer, wanted for murdering six women. They were heroes.

Newlyweds Tricia and Ethan are searching for the house of their dreams. But when they visit the remote manor that once belonged to Dr. Adrienne Hale, a renowned psychiatrist who vanished without a trace four years earlier, a violent winter storm traps them at the estate… with no chance of escape until the blizzard comes to an end. In search of a book to keep her entertained until the snow abates, Tricia happens upon a secret room. One that contains audio transcripts from every single patient Dr. Hale has ever interviewed.

Sarah Morgan is a successful and powerful defense attorney in Washington D.C. At 33 years old, she is a named partner at her firm and life is going exactly how she planned. The same cannot be said for her husband, Adam. He is a struggling writer who has had little success in his career. He begins to tire of his and Sarah’s relationship as she is constantly working. Out in the secluded woods, at Adam and Sarah’s second home, Adam engages in a passionate affair with Kelly Summers. Then, one morning everything changes. Adam is arrested for Kelly’s murder.

John Hawkins is counting down his last days as chief of police on the Lone Crow Reservation in the lonely, frigid woods of the Yukon. But when a faceless body with mysterious wounds washes up on the shores of the Porcupine River, he’s pulled deeper in than ever before. Hawkins and coroner Jacob Littlecorn suspect the disfigured body is that of theoretical physicist Graham Raphelson, also known as the “molecular madman of Trinity College”, who recently disappeared.