Where to stream Cities of the Underworld

Season 4

Cities of the Underworld

Season released 7th Sep, 2021.

Where to Watch

7plus

Free

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Season 4 Episodes

S04 Episode 1

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.

43 mins  ·  Tue, 7 Sep 2021

S04 Episode 2

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.

43 mins  ·  Tue, 14 Sep 2021

S04 Episode 3

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.

43 mins  ·  Tue, 21 Sep 2021

S04 Episode 4

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.

43 mins  ·  Tue, 28 Sep 2021

S04 Episode 5

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.

43 mins  ·  Tue, 5 Oct 2021

S04 Episode 6

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

43 mins  ·  Tue, 12 Oct 2021

S04 Episode 7

Secrets of the Ancient Metropolis

Don explores the massive underground cities in the mountains of Turkey that may have been home to the first civilization on Earth.

43 mins  ·  Tue, 19 Oct 2021

S04 Episode 8

The Lost Aztec Colony

Don follows the clues hidden underground as he searches for evidence of 10,000 Aztecs who fled Mexico and disappeared somewhere in America.

43 mins  ·  Tue, 26 Oct 2021

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