Into the Unknown Episode Rating Graph

In the heart of the Louisiana bayou, Cliff navigates the biggest baddest swamp in America in search of a shapeshifting monster known as the Rougarou.

California's Mount Shasta is a dormant volcano with a supernatural reputation. Dozens of people have vanished there without a trace, and now, armed with the latest high-tech gear, Cliff Simon searches for both scientific and paranormal explanations.

Sightings of a Sasquatch-like creature in the inhospitable desert of Southern California have made headlines for decades. Cliff Simon is determined to make a contribution to the ongoing investigation, but the story is much bigger than he ever imagined.

For over a century, people have witnessed strange orb-like lights rise up from the deepest gorges near Brown Mountain, North Carolina. Cliff Simon goes on an eerie recon mission through dangerous terrain to find out the source of the mysterious lights.

Hawaiian lore claims long-dead warriors rise on the darkest nights of the year to march in a ghostly procession through the islands. Cliff Simon arrives on the Big Island before the dark moon in hopes of witnessing the chilling phenomenon himself.

New Jersey is said to be home to a terrifying creature with bat wings, a long tail and a horse's head. Intrigued by a recent spike in sightings, Cliff Simon explores the sprawling Pine Barrens in search of the mythical beast.