Throughout the world, ancient objects have been found that leave archaeologists at a loss. Could these impossible artifacts suggest that advanced--and perhaps even extraterrestrial--civilizations existed on Earth thousands of years before our own?
| Name | Type | Role | |
|---|---|---|---|
| Gabriel Rotello | Writer | ||
| Max Thompson | Writer | ||
| Erik Pinkston | Writer | ||
| Michelle Gorski | Producer | Supervising Producer | |
| Andy DeJohn | Producer | ||
| Lara Shaghoian | Producer | Co-Producer | |
| Erik Pinkston | Producer | ||
| Richard 'Ric' Rader | Guest Star | Self - Author, Written in the Cosmos | |
| Amy Shira Teitel | Guest Star | Self - Author, Fighting for Space | |
| Julie Lee | Guest Star | Self - Vice President of Collections, Bowers Museum | |
| David Childress | Guest Star | Self - Author, Technology of the Gods | |
| Jason Martell | Guest Star | Self - Author, Knowledge Apocalypse | |
| Giorgio A. Tsoukalos | Guest Star | Self - Publisher, Legendary Times Magazine | |
| Robert Schoch | Guest Star | Self - Author, Forgotten Civilization | |
| Michio Kaku | Guest Star | Self - Author, The Future of Humanity | |
| Jeff Williams | Guest Star | Self - Geologist | |
| Deepak Shimkhada | Guest Star | Self - Professor of Hindu Studies, Claremont School of Theology | |
| William Henry | Guest Star | Self - Author/Investigative Mythologist | |
| Dominic Steavu | Guest Star | Self - Assoc. Prof., UC Santa Barbara | |
| Nova Spivack | Guest Star | Self - Chairman, Arch Mission Foundation | |
| Ana Gruia | Guest Star | Self - Curator, National Museum of Transylvanian History | |
| David Silver | Executive Producer | ||
| Max Thompson | Executive Producer | ||
| Kim Egan | Executive Producer | ||
| Giorgio A. Tsoukalos | Executive Producer | Co-Executive Producer | |
| Kevin Burns | Executive Producer | ||
| Susan E. Leventhal | Executive Producer | for HISTORY |