Sezon 2
Bölümler
1 Murder Raid Tunnels 10 Oca 2022 2 Grand Canyon's Lost Treasure 17 Oca 2022 3 Cincinnati's Secret Caverns 24 Oca 2022 4 Hotel Bunker of the Apocalypse 31 Oca 2022 5 Mystery of the Kentucky Cave 7 Şub 2022 6 Ireland's Underground Alcatraz 14 Şub 2022 7 Medieval Maze of Secrets 21 Şub 2022 8 Buried Lab of the Black Hills 28 Şub 2022 9 Subterranean Silo Survival 7 Mar 2022 10 Italy's Subterranean Secret 14 Mar 2022