Season 4 poster

Season 4

8 episodes September 7, 2021

Episodes

1 Mayan Apocalypse Sep 7, 2021 No ratings 2 America's Military Underground Sep 14, 2021 No ratings 3 America's Unmapped Murder Tunnels Sep 21, 2021 No ratings 4 America's Ancient Ancestors Sep 28, 2021 No ratings 5 The Pirate Queen's Lair Oct 5, 2021 No ratings 6 Templars and The Founding Fathers Oct 12, 2021 No ratings 7 Secrets of the Ancient Metropolis Oct 19, 2021 No ratings 8 The Lost Aztec Colony Oct 26, 2021 No ratings