Seasons & episodes

S1 · E1Once There Was a Flood 2022-11-11 · 31 min＋

Graham visits Gunung Padang, an Indonesian archeological site, to find proof of a lost civilization — and the potential cataclysm that wiped it out.

S1 · E2Stranger in a Time of Chaos 2022-11-11 · 33 min＋

In Cholula, Mexico's oldest continuously-inhabited city, the journalist inspects the world's largest pyramid for signs of a forgotten past.

S1 · E3Sirius Rising 2022-11-11 · 31 min＋

Graham discovers a fascinating pattern that may connect the spectacular megalithic temples of Malta, which he believes to be much older than reported.

S1 · E4Ghosts of a Drowned World 2022-11-11 · 30 min＋

Few scholars have investigated the Bimini rock formation off the coast of Miami, once fabled to be the road to Atlantis — but Graham dives right in.

S1 · E5Legacy of the Sages 2022-11-11 · 32 min＋

At Göbekli Tepe, the oldest known megalith in the world, Graham questions if simple hunter-gatherers alone could have built such an advanced structure.

S1 · E6America's Lost Civilization 2022-11-11 · 33 min＋

Graham visits ancient mounds in North America and wonders if they contain astronomical significance — or even warnings of an apocalyptic climate event.

S1 · E7A Fatal Winter 2022-11-11 · 29 min＋

The author returns to Turkey to explore Derinkuyu, an ancient underground city and survival bunker that could shelter thousands in times of crisis.

S1 · E8Cataclysm and Rebirth 2022-11-11 · 32 min＋

In the ancient geological sites of North America, Graham envisions an apocalyptic event that may have changed the Earth — and its inhabitants — forever.