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| Aflevering | Eerste uitzending |
|---|---|
| S01E01 - Scotland's Sin City | 23/04/2007 |
| S01E02 - Hitler's Underground Lair | 30/04/2007 |
| S01E03 - Rome's Hidden Empire | 07/05/2007 |
| S01E04 - Catacombs of Death | 14/05/2007 |
| S01E05 - City of Caves: Budapest, Hungary | 21/05/2007 |
| S01E06 - New York | 04/06/2007 |
| S01E07 - London's Lost Cities: London, England | 11/06/2007 |
| S01E08 - Beneath Vesuvius | 18/06/2007 |
| S01E09 - Freemason Underground | 25/06/2007 |
| S01E10 - Dracula's Underground: Bucharest, Romania | 09/07/2007 |
| S01E11 - Secret Pagan Underground | 16/07/2007 |
| S01E12 - Underground Bootleggers | 23/07/2007 |
| S01E13 - Rome: The Rise | 30/07/2007 |