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.

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.

London, 1812. Oliver Bennet feels trapped. Not just by the endless corsets, petticoats and skirts he's forced to wear on a daily basis, but also by society's expectations. The world—and the vast majority of his family and friends—think Oliver is a girl named Elizabeth. He is therefore expected to mingle at balls wearing a pretty dress, entertain suitors regardless of his interest in them, and ultimately become someone's wife. But Oliver can't bear the thought of such a fate.

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.

It’s the mid-'90s. Grunge and flannel are fading as the Spice Girls and Hot Topic conquer the malls. Cherry gloss glistens on the lips of the youth. Modems hiss as America comes online. And in a fog-drenched cove at the edge of New England, something terrible awakens when a fisherman reels in a gruesome catch: the remains of a young woman. Remains still pulsing with furious life.

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.

Two years ago, Louise le Blanc fled her coven and took shelter in the city of Cesarine, forsaking all magic and living off whatever she could steal. There, witches like Lou are hunted. They are feared. And they are burned. As a huntsman of the Church, Reid Diggory has lived his life by one principle: Thou shalt not suffer a witch to live. But when Lou pulls a wicked stunt, the two are forced into an impossible situation - marriage. Lou, unable to ignore her growing feelings, yet powerless to change what she is, must make a choice. And love makes fools of us all.

Stacey Evans wants only one thing: to be the best alpine ski racer she can be. Everything else—like her sweet and ultra-supportive best friend and hot-but-vapid girlfriend—is just a bonus. Fresh from a medal at her first Olympics, Stacey knows she can only get better and is firmly focused on the future, and totally not thinking about how she’s kind of a little in love with that sweet, ultra-supportive best friend....

Adelaide Henry carries an enormous steamer trunk with her wherever she goes. It’s locked at all times. Because when the trunk opens, people around Adelaide start to disappear. The year is 1915, and Adelaide is in trouble. Her secret sin killed her parents, forcing her to flee California in a hellfire rush and make her way to Montana as a homesteader. Dragging the trunk with her at every stop, she will become one of the “lone women” taking advantage of the government’s offer of free land for those who can tame it—except that Adelaide isn’t alone.

A chance encounter. An unforgettable night. And back home, trouble is brewing on the remote island of Three Dragons, where nothing feels like it used to. Alone and lonely, Sam Threadneedle wishes upon a star, hoping for change. But when said change comes, it's with a roar and not a whimper.