Episode 1
Once There Was a Flood
Graham visits Gunung Padang, an Indonesian archeological site, to find proof of a lost civilization — and the...
Episode 2
Stranger in a Time of Chaos
In Cholula, Mexico's oldest continuously-inhabited city, the journalist inspects the world's largest pyramid f...
Episode 3
Sirius Rising
Graham discovers a fascinating pattern that may connect the spectacular megalithic temples of Malta, which he...
Episode 4
Ghosts of a Drowned World
Few scholars have investigated the Bimini rock formation off the coast of Miami, once fabled to be the road to...
Episode 5
Legacy of the Sages
At Göbekli Tepe, the oldest known megalith in the world, Graham questions if simple hunter-gatherers alone cou...
Episode 6
America's Lost Civilization
Graham visits ancient mounds in North America and wonders if they contain astronomical significance — or even...
Episode 7
A Fatal Winter
The author returns to Turkey to explore Derinkuyu, an ancient underground city and survival bunker that could...
Episode 8
Cataclysm and Rebirth
In the ancient geological sites of North America, Graham envisions an apocalyptic event that may have changed...