Sezon 2
Bölümler
1 Hotel Bunker of the Apocalypse 5 Ağu 2021 
2 Mystery of the Kentucky Cave 12 Ağu 2021 
3 Cincinnati's Secret Caverns 19 Ağu 2021 
4 Buried Lab of the Black Hills 26 Ağu 2021 
5 Ireland's Underground Alcatraz 2 Eyl 2021 
6 Subterranean Silo Survival 9 Eyl 2021 
7 Italy's Subterranean Secret 16 Eyl 2021 
8 Grand Canyon's Lost Treasure 23 Eyl 2021 
9 Murder Raid Tunnels 30 Eyl 2021 
10 Medieval Maze of Secrets 7 Eki 2021