Episode 1 | The World Beneath Our Feet

Humanity explores Earth's underground realms, seeking secrets from the past or clues to the future, uncovering profound mysteries buried beneath rock layers and hidden in vast caves, pushing the boundaries of subterranean explorat...

Episode 2 | The Time Travelers

A look at whether time travel has already occurred, on purpose or by accident, and scientists who believe it is theoretically possible.

Episode 3 | Secrets of Ancient Structures

Mysterious ancient ruins scattered globally in deserts, mountains, jungles. Archaeology attempts to uncover history behind construction of these wonders and their purpose.

Episode 4 | Mysteries of the Vikings

During the Middle Ages the Vikings were infamous for being a bloodthirsty band of seafaring warriors. But while we are all aware of the Vikings notorious reputation, Historians are learning surprising new things about this Norse s...

Episode 5 | Strange Stories of the Presidents

The men who've had the honor of being President of the United States are celebrated as esteemed leaders in the annals of history. There are many bizarre tales involving U.S. Presidents that defy explanation and still shrouded in m...

Episode 6 | Bizarre Afflictions

Exploring inexplicable ailments affecting the body and mind from wounds without cause to a madness that makes people dance to death and whether these bizarre afflictions are real or imagined, natural or supernatural.

Episode 7 | Strange Technology

There are many puzzling artifacts from around the world that challenge everything we know about the technological capabilities of our distant ancestors.

Episode 8 | Unbreakable Codes

Cracking codes has fascinated humanity for centuries. From enigmatic puzzles to secret symbols, deciphering history's unbreakable codes may hold answers to mysteries past and present.

Episode 9 | Strange Stories of World War II

World War II was the largest, and deadliest, conflict in human history. From 1939 until 1945, more than fifty nations engaged in harrowing combat-and during that time, a number of intriguing and persistent mysteries were born. Nea...

Episode 10 | Monsters Among Us

Centers on tales of monsters hiding in shadows sparking fascination and fear through the ages. Legends now dismissed, but terrifying creatures may yet dwell undiscovered.