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.

When Margaret and her husband Hal bought the large Victorian house on Hawthorn Street—for sale at a surprisingly reasonable price—they couldn’t believe they finally had a home of their own. Then they discovered the hauntings. Every September, the walls drip blood. The ghosts of former inhabitants appear, and all of them are terrified of something that lurks in the basement. Most people would flee. Margaret is not most people. Margaret is staying.

Kae Roscoe's daughter went missing in the woods 16 months ago, but when she returns, she's not the same person. She hardly speaks, doesn't eat, responds with extreme violence, and things get worse when she's released from the hospital. There's definitely something very different about Molly, and her reappearance is making strange things happen to everyone around her.

Connecticut, 1666. An ancient spirit awakens in a dark wood. The wildfolk call him Father, slayer, protector. The colonists call him Slewfoot, demon, devil. To Abitha, a recently widowed outcast, alone and vulnerable in her pious village, he is the only one she can turn to for help. Together, they ignite a battle between pagan and Puritan - one that threatens to destroy the entire village, leaving nothing but ashes and bloodshed in their wake.

There is much that heavily pregnant Grace still doesn't know about her new husband King's background. So, when word comes that King's father is dying, Grace is eager to accompany him to his childhood home, Blackwater, located in a remote part of Tasmania. Things go badly from the start. The house is in terrible repair, King's dying father yells at Grace to leave and King's twin sister, Ruth, seems disturbed by Grace's presence. After his father's death, King convinces Grace they must stay and help Ruth settle the estate, but as time stretches on he grows strange and distant.

1920s England. Sarah Piper’s lonely, threadbare existence changes when her temporary agency sends her to assist an obsessed ghost hunter. Alistair Gellis—rich, handsome, and scarred by World War I—has been summoned to investigate the spirit of the nineteen-year-old maid Maddy Clare, who is said to haunt the barn where she committed suicide.

A local legend gone haywire. A small-town cop. An impossible eyewitness testimony. Which is easier to believe—that killer mermaids exist, or that one person is worth risking everything for?

Ben and Marian Rolfe are desperate to escape a stifling summer in their tiny Brooklyn apartment, so when they get the chance to rent a mansion in upstate New York for the entire summer for only $900, it’s an offer that’s too good to refuse. There’s only one catch: Behind a strange and intricately carved door in a distant wing of the house lives elderly Mrs. Allardyce, and the Rolfes will be responsible for preparing her meals.

Joe works at a facility that performs human experimentation. His work just followed him home. The government wanted to unlock hidden abilities in the human mind. They put subjects in extreme sensory deprivation. All the test subjects went violently insane. But the research continued. Today it has been perfected. Almost perfected. 

No electricity, no family, no connection to the outside world. For eight years, Cooper and his young daughter, Finch, have lived in isolation in a remote cabin in the northern Appalachian woods. And that's exactly the way Cooper wants it, because he's got a lot to hide. Finch has been raised on the books filling the cabin’s shelves and the beautiful but brutal code of life in the wilderness. But she’s starting to push back against the sheltered life Cooper has created for her - and he’s still haunted by the painful truth of what it took to get them there.