A massive, alien-like fortress built into a mountainside is the central node to a network of pipelines that race outwards like tentacles. Stories: 1) Shuinandong Smelter, Jinguashi, Taiwan; 2) Chanute Air Force Base, Campaign County, Illinois, USA; 3) Pidhirtsi Castle, Ukraine; 4) Fort Hermann, Bovec Basin, Slovenia
| Name | Type | Role | |
|---|---|---|---|
| Luke Wales | Producer | Series Producer | |
| Tom Williams | Producer | Series Producer | |
| Andrew Lessner | Producer | for SCIENCE CHANNEL | |
| Tamsin Curry | Producer | Shooting Producer | |
| Rob Bell | Guest Star | Self - Engineer and Adventurer | |
| James S. Corum | Guest Star | Self - Military Historian | |
| Sascha Auerbach | Guest Star | Self - Historian | |
| Claire Barratt | Guest Star | Self - Engineer | |
| John Pratt | Guest Star | Self - Former Employee, Chanute Air Force Base | |
| Vladimir Lipovec | Guest Star | Self - Slovenian Historian | |
| Cheng Chun-Shan | Guest Star | Self - Local Resident and Former Employee, Jinguashi | |
| Geoffrey 'Geoff' Wawro | Guest Star | Self - Historian and Author | |
| Dominic Selwood | Guest Star | Self - Historian and Author | |
| Ivan Dudych | Guest Star | Self - Ukrainian Historian | |
| Jim Meigs | Guest Star | Self - Author and Journalist | |
| Michele Mitchell | Guest Star | Self - Historian and Author | |
| Lynette Nusbacher | Guest Star | Self - Military Historian | |
| Henry Scott | Executive Producer | ||
| Neil Laird | Executive Producer | for SCIENCE CHANNEL | |
| Bruce Burgess | Executive Producer | ||
| Luke Wales | Director | ||
| Tom Williams | Director | ||
| Tamsin Curry | Director |