Cities of the Underworld - Season 4
1 - Mayan Apocalypse
Air Date: September 7, 2021
Don Wildman explores deep below ancient ruins as he searches for clues pointing to the true fate of the once-mighty Mayan empire.
2 - America's Military Underground
Air Date: September 14, 2021
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.
3 - America's Unmapped Murder Tunnels
Air Date: September 21, 2021
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.
4 - America's Ancient Ancestors
Air Date: September 28, 2021
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.
5 - The Pirate Queen's Lair
Air Date: October 5, 2021
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.
6 - Templars and The Founding Fathers
Air Date: October 12, 2021
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
7 - Secrets of the Ancient Metropolis
Air Date: October 19, 2021
Don explores the massive underground cities in the mountains of Turkey that may have been home to the first civilization on Earth.
8 - The Lost Aztec Colony
Air Date: October 26, 2021
Don follows the clues hidden underground as he searches for evidence of 10,000 Aztecs who fled Mexico and disappeared somewhere in America.