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