Murder Raid Tunnels (S2E1)
1/10/2022
Grand Canyon's Lost Treasure (S2E2)
1/17/2022
Cincinnati's Secret Caverns (S2E3)
1/24/2022
Hotel Bunker of the Apocalypse (S2E4)
1/31/2022
Mystery of the Kentucky Cave (S2E5)
2/7/2022
Ireland's Underground Alcatraz (S2E6)
2/14/2022
Medieval Maze of Secrets (S2E7)
2/21/2022
Buried Lab of the Black Hills (S2E8)
2/28/2022
Subterranean Silo Survival (S2E9)
3/7/2022
Italy's Subterranean Secret (S2E10)
3/14/2022
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