An abandoned system of caves was once the meeting place of a secret society that worshiped Satan and performed black magic, and why a Founding Father was a frequent guest. Stories: 1) British S.O.E Cave & Tragjas, Albania; 2) Trans-Allegheny Lunatic Asylum, West Virginia, USA; 3) Hellfire Caves, West Wycombe, UK
| Name | Type | Role | |
|---|---|---|---|
| Luke Wales | Producer | Series Producer | |
| Tom Williams | Producer | Series Producer | |
| Andrew Lessner | Producer | for SCIENCE CHANNEL | |
| Annie MacKinder | Producer | Shooting Producer | |
| Jack Orr | Guest Star | Self - Local Historian | |
| Klint Janulis | Guest Star | Self - Ex-Special Forces Operative | |
| Claire Barratt | Guest Star | Self - Engineer | |
| Fran Scott | Guest Star | Self - Scientist | |
| James S. Corum | Guest Star | Self - Military Historian | |
| Dominic Selwood | Guest Star | Self - Historian and Author | |
| Jack Orr | Guest Star | Self - Local Historian, Hellfire Caves | |
| Rob Bell | Guest Star | Self - Engineer and Adventurer | |
| Michele Mitchell | Guest Star | Self - Historian and Author | |
| Andrew Gough | Guest Star | Self - Historian and Author | |
| Sofokli Daupaj | Guest Star | Self - Local Resident, Tragjas, Albania | |
| Rebecca Gleeson | Guest Star | Self - Operations Manager, Trans-Allegheny Lunatic Asylum | |
| Jim Meigs | Guest Star | Self - Author and Journalist | |
| Bruce Burgess | Executive Producer | ||
| Henry Scott | Executive Producer | ||
| Neil Laird | Executive Producer | for SCIENCE CHANNEL | |
| Annie MacKinder | Director | ||
| Luke Wales | Director | ||
| Tom Williams | Director |