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.

Fresh out of rehab, Mallory Quinn takes a job as a babysitter for Ted and Caroline Maxwell. She is to look after their five-year-old son, Teddy. Mallory immediately loves it. She has her own living space, goes out for nightly runs, and has the stability she craves. And she sincerely bonds with Teddy, a sweet, shy boy who is never without his sketchbook and pencil. His drawings are the usual fare: trees, rabbits, balloons. But one day, he draws something different: a man in a forest, dragging a woman’s lifeless body.

In a boarded-up house on a dead-end street at the edge of the wild Washington woods lives a family of three. A teenage girl who isn’t allowed outside, not after last time. A man who drinks alone in front of his TV, trying to ignore the gaps in his memory. And a house cat who loves napping and reading the Bible. An unspeakable secret binds them together, but when a new neighbor moves in next door, what is buried out among the birch trees may come back to haunt them all.

All Rob wanted was a normal life. She almost got it, too: a husband, two kids, a nice house in the suburbs. But Rob fears for her oldest daughter, Callie, who collects tiny bones and whispers to imaginary friends. Rob sees a darkness in Callie, one that reminds her too much of the family she left behind. She decides to take Callie back to her childhood home, to Sundial, deep in the Mojave Desert. And there she will have to make a terrible choice.

Ana and Reid needed a lucky break. The horrifically complicated birth of their first child has left Ana paralyzed, bitter, and struggling: with mobility, with her relationship with Reid, with resentment for her baby. That's about to change with the words any New Yorker would love to hear—affordable housing lottery. They've won an apartment in the Deptford, one of Manhattan's most revered buildings. Reid dismisses disturbing events and Ana’s deep unease and paranoia as the price of living in New York—people are odd—but he can't explain the needle-like bite marks on the baby.

Thirteen-year-old Ben is sent to a remote reform program for troubled teens by a juvenile court judge. But when he arrives at the camp, located on the edge of the vast wilderness of northwestern Montana, he immediately recognizes that there is something off about the counselors. They’re too friendly and upbeat…yet Ben can tell there’s an undercurrent of menace. As he gets to know the boys in his cabin, he soon discovers that they each have far more going for them than whatever crime landed them there.

In the summer of 1994, psychologist Daniel Hill buys a rustic farmhouse nestled in the rolling hills of West Virginia. Along with his wife and teenage daughter, the family uproots their lives in Ohio and moves south. They are initially seduced by the natural beauty of the country setting. That soon changes when they discover a hidden room in the basement with a well, boarded shut and adorned with crucifixes. Local legends about the previous owner being an exorcist come to light, but by then, all Hell has broken loose.

"Pray they are hungry." Kara finds these words in the mysterious bunker that she’s discovered behind a hole in the wall of her uncle's house. Freshly divorced and living back at home, Kara now becomes obsessed with these cryptic words and starts exploring the peculiar bunker - only to discover that it holds portals to countless alternate realities. But these places are haunted by creatures that seem to hear thoughts...and the more you fear them, the stronger they become.

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.

Eric Ross is on the run from a mysterious past with his two daughters in tow. Having left his wife, his house, his whole life behind in Maryland, he's desperate for money—it's not easy to find steady, safe work when you can't provide references, you can't stay in one place for long, and you're paranoid that your past is creeping back up on you.

Emma Carpenter lives in isolation with her golden retriever Laika, house-sitting an old beachfront home on the rainy Washington coast. Her only human contact is her enigmatic old neighbor, Deek, and (via text) the house’s owner, Jules. One day, she reads a poorly written—but gruesome—horror novel by the author H. G. Kane, and posts a one-star review that drags her into an online argument with none other than the author himself. Soon after, disturbing incidents start to occur at night.

Fresh out of jail and eager to start a new life, Chet Moran and his pregnant wife, Trish, leave town to begin again. But an ancient evil is looming, and what seems like a safe haven may not be all it appears. Snared and murdered by a vile, arcane horror, Chet quickly learns that pain and death are not unique to the living. Now the lives and very souls of his wife and unborn child are at stake. To save them, he must journey into the bowels of purgatory in search of a sacred key promised to restore the natural order of life and death.

"Mom seems off." Her brother's words echo in Sam Montgomery's ear as she turns onto the quiet North Carolina street where their mother lives alone. She brushes the thought away as she climbs the front steps. Sam's excited for this rare extended visit, and looking forward to nights with just the two of them, drinking boxed wine, watching murder mystery shows, and guessing who the killer is long before the characters figure it out. But stepping inside, she quickly realizes home isn’t what it used to be.

To eight-year-old Bela, her family is her world. There’s Mommy, Daddo, and Grandma Ruth. But there is also Other Mommy, a malevolent entity who asks her every day: “Can I go inside your heart?” When horrifying incidents around the house signal that Other Mommy is growing tired of asking Bela the question over and over, Bela understands that unless she says yes, her family will soon pay. Other Mommy is getting restless, stronger, bolder. Only the bonds of family can keep Bela safe, but other incidents show cracks in her parents’ marriage. The safety Bela relies on is about to unravel.

For nearly two decades, Jamie Warren has been running from darkness. He's haunted by a traumatic childhood and the guilt at having disappeared from his disabled brother's life. But then a series of unusual events reunites him with his estranged brother and their childhood friends, and none of them can deny the sense of fate that has seemingly drawn them back together. Nor can they deny the memories of that summer, so long ago—the strange magic taught to them by an even stranger man, and the terrible act that has followed them all into adulthood.