The World Beneath Our Feet

Season 6, Episode 1 TV-PG CC HD CC SD

Humanity has launched satellites into outer space and submarines to the ocean floor, but the ground below Earth's surface remains shrouded in mystery. Are there profound secrets buried beneath layers of rock, or hidden in vast caves? Can the subterranean world below shed light on humanity's past, or even its future?

The Time Travelers

Season 6, Episode 2 TV-PG CC HD CC SD

Mysteries of the Vikings

Season 6, Episode 4 TV-PG CC HD CC SD

During the Middle Ages, the Vikings were infamous for being a bloodthirsty band of seafaring warriors. But while we're all aware of the Vikings' notorious reputation, historians are learning surprising new things about this Norse society. Is it possible that they were not the savage brutes we think of today--but rather, a highly advanced civilization?

Strange Stories of the Presidents

Season 6, Episode 5 TV-PG CC HD CC SD

The men who've had the honor of being President of the United States are celebrated as esteemed leaders, their names immortalized in the annals of history. But there are many bizarre tales involving U.S. Presidents that defy explanation and are still shrouded in mystery. Could the truth behind these astonishing accounts re-write America's past, and perhaps re-shape its future?

Bizarre Afflictions

Season 6, Episode 6 TV-PG CC HD CC SD

Throughout history, tales of inexplicable maladies to both the body, and the mind, have stirred morbid curiosity and palpable fear. From mysterious wounds that appear for no apparent reason--to a peculiar madness that compels people to dance themselves to death. Are these bizarre afflictions merely fabrications of the mind? Or could they arise from unseen forces that are beyond our comprehension?

Strange Technology

Season 6, Episode 7 TV-PG CC HD CC SD

There are many puzzling artifacts from around the world that challenge everything we know about the technological capabilities of our distant ancestors. Some ancient objects are so mysterious they've spawned endless debate and theories, and others indicate a world of high technology that we never thought possible. As we continue to study these strange artifacts, will we discover the true potential of human ingenuity?

Unbreakable Codes

Season 6, Episode 8 TV-PG CC HD CC SD

There's nothing more fascinating than a code that can't be cracked. For centuries, mankind has devised ingenious ways to hide valuable information--using everything from enigmatic puzzles, to complex ciphers and secret symbols. If history's unbreakable codes can be deciphered...could we unlock answers to some of the greatest mysteries of both the past and present?

Strange Stories of WWII

Season 6, Episode 9 TV-PG CC HD CC SD

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. Nearly eighty years later, curious stories about everything from lost gold to secret societies and highly-advanced technology remain unexplained. Can new information help us better understand the strangest tales of the Second World War?

Monsters Among Us

Season 6, Episode 10 TV-PG CC HD CC SD

Since the dawn of humanity, tales of monstrous creatures lurking in the shadows of our world have sparked both fascination and fear. Today, we often dismiss these accounts as the stuff of myth and legend, but are we overlooking a potentially terrifying reality? With scientists discovering as many as 18,000 new animal species every year, isn't it conceivable that there could be real-life, flesh and blood monsters living among us?