Cities of the Underworld - All Episodes
Season 1
| Episode | Name | Airdate |
|---|---|---|
| S01E01 | Scotland's Sin City | Apr 23, 2007 |
| S01E02 | Hitler's Underground Lair | Apr 30, 2007 |
| S01E03 | Rome's Hidden Empire | May 7, 2007 |
| S01E04 | Catacombs of Death | May 14, 2007 |
| S01E05 | City of Caves: Budapest, Hungary | May 21, 2007 |
| S01E06 | New York | Jun 4, 2007 |
| S01E07 | London's Lost Cities: London, England | Jun 11, 2007 |
| S01E08 | Beneath Vesuvius | Jun 18, 2007 |
| S01E09 | Freemason Underground | Jun 25, 2007 |
| S01E10 | Dracula's Underground: Bucharest, Romania | Jul 9, 2007 |
| S01E11 | Secret Pagan Underground | Jul 16, 2007 |
| S01E12 | Underground Bootleggers | Jul 23, 2007 |
| S01E13 | Rome: The Rise | Jul 30, 2007 |
Season 2
| Episode | Name | Airdate |
|---|---|---|
| S02E01 | Underground Apocalypse | Jan 28, 2008 |
| S02E02 | Vietnam | Feb 4, 2008 |
| S02E03 | A-Bomb Underground | Feb 11, 2008 |
| S02E04 | Viking Underground | Feb 25, 2008 |
| S02E05 | Hitler's Last Secret | Mar 3, 2008 |
| S02E06 | Maya Underground | Mar 10, 2008 |
| S02E07 | Mob Underground | Mar 17, 2008 |
| S02E08 | Prophecies from Below | Mar 24, 2008 |
| S02E09 | New York: Secret Societies | Mar 31, 2008 |
| S02E10 | Washington D.C.: Seat of Power | Apr 15, 2008 |
| S02E11 | Stalin's Secret Lair | Apr 22, 2008 |
| S02E12 | Katrina Underground | Apr 29, 2008 |
| S02E13 | Secret Soviet Bases | May 5, 2008 |
Season 3
| Episode | Name | Airdate |
|---|---|---|
| S03E01 | City of Blood: London, England | Oct 26, 2008 |
| S03E02 | Okinawa: Tunnels of Hell | Nov 2, 2008 |
| S03E03 | Real Mafia Underground | Nov 9, 2008 |
| S03E04 | Secret Sin City: Las Vegas, USA | Nov 16, 2008 |
| S03E05 | Hitler's Trenches | Nov 23, 2008 |
| S03E06 | Barbarian's Lair | Dec 1, 2008 |
| S03E07 | Land of Manson | Dec 7, 2008 |
| S03E08 | Gladiators: Blood Sport | Dec 15, 2008 |
| S03E09 | Secret Holy Land | Dec 22, 2008 |
| S03E10 | Under the Rock | Jan 12, 2009 |
| S03E11 | Tomb of the Lost Mummies | Jan 26, 2009 |
| S03E12 | Gods of War | Feb 2, 2009 |
| S03E13 | Alcatraz Down Under: Sydney, Australia | Feb 9, 2009 |
Season 4
| Episode | Name | Airdate |
|---|---|---|
| S04E01 | Mayan Apocalypse | Sep 7, 2021 |
| S04E02 | America's Military Underground | Sep 14, 2021 |
| S04E03 | Murder Tunnels | Sep 21, 2021 |
| S04E04 | America's Ancient Ancestors | Sep 28, 2021 |
| S04E05 | The Pirate Queen's Lair | Oct 5, 2021 |
| S04E06 | Templars And The Founding Fathers | Oct 12, 2021 |
| S04E07 | Secrets of the Ancient Metropolis | Oct 19, 2021 |
| S04E08 | The Lost Aztec Colony | Oct 26, 2021 |
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