According to legend, the ancient Roman city of Hierapolis hides a secret portal to the underworld beneath its streets; armed with pioneering technology, archaeologists gain rare access to investigate the deadly truth behind these hellish myths.
| Name | Type | Role | |
|---|---|---|---|
| Bella Falk | Producer | ||
| Laura Voak | Producer | ||
| Mark Wilson | Guest Star | Self - Historian | |
| Julian Bennett | Guest Star | Self - Archaeologist | |
| Mehmet Ekmekçi | Guest Star | Self - Hydrogeologist | |
| Erhan Altunel | Guest Star | Self - Geologist | |
| Bella Falk | Director |