| Name | First Aired | Runtime | Image | |
|---|---|---|---|---|
| S02E01 | Murder Raid Tunnels |
January 10, 2022
U&Yesterday
|
45 | |
| S02E02 | Grand Canyon's Lost Treasure |
January 17, 2022
U&Yesterday
|
45 | |
| S02E03 | Cincinnati's Secret Caverns |
January 24, 2022
U&Yesterday
|
45 | |
| S02E04 | Hotel Bunker of the Apocalypse |
January 31, 2022
U&Yesterday
|
45 | |
| S02E05 | Mystery of the Kentucky Cave |
February 7, 2022
U&Yesterday
|
45 | |
| S02E06 | Ireland's Underground Alcatraz |
February 14, 2022
U&Yesterday
|
45 | |
| S02E07 | Medieval Maze of Secrets |
February 21, 2022
U&Yesterday
|
45 | |
| S02E08 | Buried Lab of the Black Hills |
February 28, 2022
U&Yesterday
|
45 | |
| S02E09 | Subterranean Silo Survival |
March 7, 2022
U&Yesterday
|
45 | |
| S02E10 |
Italy's Subterranean Secret
series finale
|
March 14, 2022
U&Yesterday
|
45 |
No artwork of this type.
No artwork of this type.
No artwork of this type.