An underground labyrinth once used by a secret police force could warp the mind and turn friend into foe. Stories: 1) Waverly Hills Sanatorium, Louisville, Kentucky, USA; 2) Porto Flavia, Masua, Sardinia, Italy; 3) Odessa Catacombs, Odessa, Ukraine; 4) Hario Wireless Telegraph Station, Sasebo, Japan
| Name | Type | Role | |
|---|---|---|---|
| Nick Chapman | Producer | Shooting Producer | |
| Andrew Lessner | Producer | for SCIENCE CHANNEL | |
| Luke Wales | Producer | Series Producer | |
| Tom Williams | Producer | Series Producer | |
| Pavel Zagnyboroda | Guest Star | Self - Local Guide, Odessa Catacombs | |
| Dougal Jerram | Guest Star | Self - Earth Scientist | |
| Hideaki Matsuo | Guest Star | Self - Local Historian, Hario Wireless Telegraph Station | |
| Sascha Auerbach | Guest Star | Self - Historian | |
| Geoffrey 'Geoff' Wawro | Guest Star | Self - Author & Historian | |
| Lynette Nusbacher | Guest Star | Self - Military Historian | |
| Dale Clark | Guest Star | Self - Local Guide, Waverly Hills Sanatorium | |
| Shini Somara | Guest Star | Self - Engineer | |
| Claire Barratt | Guest Star | Self - Engineer | |
| Antonio Littarru | Guest Star | Self - Local Expert, Porto Flavia | |
| Jim Meigs | Guest Star | Self - Author and Journalist | |
| Neil Laird | Executive Producer | for SCIENCE CHANNEL | |
| Bruce Burgess | Executive Producer | ||
| Henry Scott | Executive Producer | ||
| Tom Williams | Director | ||
| Nick Chapman | Director | ||
| Luke Wales | Director |