Season 1
S1.E0 ∙ IstanbulS1.E1 ∙ Scotland's Sin CityS1.E2 ∙ Hitler's Underground LairS1.E3 ∙ Rome's Hidden EmpireS1.E4 ∙ Catacombs of DeathS1.E5 ∙ City of CavesS1.E6 ∙ New YorkS1.E7 ∙ London's Lost CitiesS1.E8 ∙ Beneath VesuviusS1.E9 ∙ Freemason UndergroundS1.E10 ∙ Dracula's UndergroundS1.E11 ∙ Secret Pagan UndergroundS1.E12 ∙ Underground BootleggersS1.E13 ∙ Rome: The Rise
Season 2
S2.E1 ∙ Underground ApocalypseS2.E2 ∙ VietnamS2.E3 ∙ A-Bomb UndergroundS2.E4 ∙ Viking UndergroundS2.E5 ∙ Hitler's Last SecretS2.E6 ∙ Maya UndergroundS2.E7 ∙ Mob UndergroundS2.E8 ∙ Prophecies from BelowS2.E9 ∙ New York: Secret SocietiesS2.E10 ∙ Washington, D.C.: Seat of PowerS2.E11 ∙ Stalin's Secret LairS2.E12 ∙ KatrinaS2.E13 ∙ Secret Soviet Bases
Season 3
S3.E1 ∙ City of BloodS3.E2 ∙ Okinawa: Tunnels of HellS3.E3 ∙ Real Mafia UndergroundS3.E4 ∙ Secret Sin CityS3.E5 ∙ Hitler's TrenchesS3.E6 ∙ Barbarian's LairS3.E7 ∙ Land of MansonS3.E8 ∙ Gladiators: Blood SportS3.E9 ∙ Secret Holy LandS3.E10 ∙ Under the RockS3.E11 ∙ Tomb of the Lost MummiesS3.E12 ∙ Gods of WarS3.E13 ∙ Alcatraz Down UnderS3.E14 ∙ The JFK Assassination
Season 4
Cities of the Underworld (2007)
As we descend beneath our modern day cities, we are met with ancient and hidden secrets. Journey with us back through history and rediscover cities of the underworld.