Phil Torres and Jessica Chobot investigate a strange phenomenon that's been haunting Mammoth Cave for generations. Is there something else deep within the largest cave system in the world? Or is it the team's minds playing tricks?
| Name | Type | Role | |
|---|---|---|---|
| Braveheart | Guest Star | Self - Native American Expert | |
| Mark Wenner | Guest Star | Self - Cave Research Foundation | |
| Patricia Kambesis | Guest Star | Self - Geologist, Cave Research Foundation | |
| Jonathan Haug | Executive Producer | ||
| Casey Brumels | Executive Producer | ||
| Brad Kuhlman | Executive Producer | ||
| Michael Gara | Executive Producer | ||
| Josh Gates | Executive Producer | ||
| Scott Hartford | Executive Producer |