Season 4

No season overview available.

Episodes

Each episode has its own detail page.

Episode 143 min2021-09-07

Mayan Apocalypse

Don Wildman explores deep below ancient ruins as he searches for clues pointing to the true fate of the once-mighty Mayan empire.

Episode 243 min2021-09-14

America's Military Underground

Don explores top-secret military and government tunnels and looks into classified technology that could be used to build entire cities... right under our feet.

Episode 343 min2021-09-21

America's Unmapped Murder Tunnels

Don uses brand-new mapping technology to expose the dark and deadly uncharted spaces beneath American cities. He explores the criminal underworld below Portland, Oregon; Seattle, Washington; Chicago, Illinois; and Los Angeles, California.

Episode 443 min2021-09-28

America's Ancient Ancestors

Don goes deep beneath the great lakes and explores flooded caves as he searches for evidence of a mysterious, cave-dwelling society that may have been the first people to reach America.

Episode 543 min2021-10-05

The Pirate Queen's Lair

Don explores newly discovered ruins and caves in Croatia as he uncovers the true story of a formidable queen who dared to defy the mighty Roman Empire.

Episode 643 min2021-10-12

Templars and The Founding Fathers

Don goes deep beneath a Knights Templar stronghold in Turkey to explore a provocative theory that may link the fabled secret society to the founding fathers of America. English