Revisiting deserted engineering projects to find out how they were built and why they were mysteriously abandoned. Stories: 1) Goat Canyon Trestle Bridge, California, USA; 2) Duga Woodpecker, Duga, Ukraine; 3) Prora, Germany; 4) Grand Goulets Road, France
| Name | Type | Role | |
|---|---|---|---|
| David Caldwell-Evans | Producer | Series Producer | |
| Roma Agrawal | Guest Star | Self - Structural Engineer | |
| Dan Davis | Guest Star | Self - San Diego Transport Engineer | |
| Pierre Drogue | Guest Star | Self - Road Worker, France | |
| Saul David | Guest Star | Self - Military Historian and Author | |
| James S. Corum | Guest Star | Self - Military Historian | |
| Rob Bell | Guest Star | Self - Engineer and Adventurer | |
| Martin Archer | Guest Star | Self - Space Physicist | |
| Andrew Gough | Guest Star | Self - Historian and Author | |
| Katja Lucke | Guest Star | Self - Historian, Germany | |
| Diana Hyatt | Guest Star | Self - Pacific Southwest Railroad Museum | |
| Kyle McCabe | Executive Producer | for SCIENCE CHANNEL | |
| Henry Scott | Executive Producer | ||
| Bruce Burgess | Executive Producer |