In the fall of 1993, the quiet suburb of Harting Farms is shocked when children begin to vanish, and one is found dead near December Park - a great, sweeping expanse that is sunken below the streets and surrounded on three sides by vast woodlands, a place children believe is haunted. Newspapers call the abductor the Piper because he has come to lead children away, while kids whisper darker names for him in the school halls. Angelo Mazzone and his friends discover a link to the dead girl and take up the search for the killer.

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.

Andrew Larimer has left his past behind. Rising up the ranks in a New York law firm, and with a heavily pregnant wife, he is settling into a new life far from Kingsport, the town in which he grew up. But when he receives a late-night phone call from an old friend, he has no choice but to return home.

It’s the house of their dreams. Former marine Harry and his wife, Sasha, have packed up their life and their golden retriever, Dash, and fled the corporate rat race to live off the land in rural Idaho. Their breathtaking new home sits on more than forty acres of meadow, aspen trees, and pine forest in the Teton Valley. Even if their friends and family think it’s a strange choice for an up-and-coming pair of urban professionals, Harry and Sasha couldn’t be happier about the future they’re building, all by their lonesome.

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.

Claire Kovalik is days away from being unemployed—made obsolete—when her beacon repair crew picks up a strange distress signal. With nothing to lose and no desire to return to Earth, Claire and her team decide to investigate.

In the summer of 1988, the mutilated bodies of several missing girls begin to turn up in a small Maryland town. The grisly evidence leads police to the terrifying assumption that a serial killer is on the loose in the quiet suburb. But soon a rumor begins to spread that the evil stalking local teens is not entirely human. Law enforcement, as well as members of the FBI, are certain that the killer is a living, breathing madman - and he’s playing games with them.

Caught behind the lines of Hitler's Final Solution, Saul Laski is one of the multitudes destined to die in the notorious Chelmno extermination camp. Until he rises to meet his fate and finds himself face to face with an evil far older, and far greater, than the Nazis themselves. Compelled by the encounter to survive at all costs, so begins a journey that for Saul will span decades and cross continents, plunging into the darkest corners of 20th century history to reveal a secret society of beings who may often exist behind the world's most horrible and violent events.

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.

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.

When the Imagine Network commissioned a documentary on mermaids, to be filmed from the cruise ship Atargatis, they expected what they had always received before: an assortment of eyewitness reports that proved nothing, some footage that proved even less, and the kind of ratings that only came from peddling imaginary creatures to the masses.

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.

For over 20 years, Belasco House has stood empty. Regarded as the Mt. Everest of haunted houses, its shadowed walls have witnessed scenes of unimaginable horror and depravity. All previous attempts to probe its mysteries have ended in murder, suicide, or insanity.

But now, a new investigation has been launched, bringing four strangers to Belasco House in search of the ultimate secrets of life and death. A wealthy publisher, brooding over his impending death, has paid a physicist and two mediums to establish the facts of life after death once and for all. For one night, they will investigate the Belasco House and learn exactly why the townsfolk refer to it as the Hell House.

St. Vincent's Orphanage for Boys. Turn of the century, in a remote valley in Pennsylvania. Here, under the watchful eyes of several priests, thirty boys work, learn, and worship. Peter Barlow, orphaned as a child by a gruesome murder, has made a new life here. As he approaches adulthood, he has friends, a future...a family. Then, late one stormy night, a group of men arrive at their door, one of whom is badly wounded, occult symbols carved into his flesh. His death releases an ancient evil that spreads like sickness, infecting St. Vincent's and the children within.

Aaron Decker's life changes one December morning when his wife, Allison, is killed. Haunted by her absence - and her ghost - Aaron goes through her belongings, where he finds a receipt for a motel room in another part of the country. Piloted by grief and an increasing sense of curiosity, Aaron embarks on a journey to discover what Allison had been doing in the weeks prior to her death.