A strange Cuban prison, an eerie escape route for Los Angeles, a dam in Italy, and an underwater marvel near Dover, England that changed history. Stories: 1) Presidio Modelo Prison, Isla de la Juventud, Cuba; 2) Shoemaker Canyon Road, Los Angeles, California, USA; 3) Vajont Dam, Bellund, Italy; 4) Phoenix Caisson, Littlestone, UK
| Name | Type | Role | |
|---|---|---|---|
| Katherine 'Kate' Swanson | Producer | ||
| David Caldwell-Evans | Producer | Series Producer | |
| Rob Bell | Guest Star | Self - Engineer and Adventurer | |
| James S. Corum | Guest Star | Self - Military Historian | |
| Roma Agrawal | Guest Star | Self - Structural Engineer | |
| Dougal Jerram | Guest Star | Self - Earth Scientist | |
| Gualdemar Morales Llevaron | Guest Star | Self - Ex-Guard, Presidio Modelo Prison | |
| Lynette Nusbacher | Guest Star | Self - Military Historian | |
| Andrew Gough | Guest Star | Self - Historian and Author | |
| Daniel 'Dan' Dickrell | Guest Star | Self - Mechanical Engineer | |
| Bruce Burgess | Executive Producer | ||
| Henry Scott | Executive Producer | ||
| Kyle McCabe | Executive Producer | for SCIENCE CHANNEL | |
| Katherine 'Kate' Swanson | Director |