Reports of encounters with strange beings and sightings of mysterious objects in the sky have occurred throughout history. A 13th century historical book, Otia Imperialia, includes an account of a creature descending from a flying craft over Bristol, England. The log from Christopher Columbus' first voyage to America contains a report of strange lights in the sky. Medieval art pieces depict disc-shaped objects floating in the heavens. Sightings of flying cigar-shaped crafts were reported during the Black Plague. And there were even discussions of extraterrestrial life among America's Founding Fathers. Could these sightings, coming from every part of the world, from biblical times to present day, be evidence that aliens have been with us all along?
| Name | Type | Role | |
|---|---|---|---|
| Max Thompson | Writer | ||
| Brian Coughlin | Writer | ||
| Kevin Burns | Writer | ||
| Frankie Glass | Producer | Supervising Producer | |
| Max Thompson | Producer | ||
| Giorgio A. Tsoukalos | Guest Star | Self - Publisher, Legendary Times Magazine | |
| Philip Coppens | Guest Star | Self - Author/Investigative Journalist | |
| Bill Birnes | Guest Star | Self - Author/UFO Investigator | |
| C. Scott Littleton | Guest Star | Self - Prof. Emeritus of Anthropology, Occidental College | |
| Nancy Red Star | Guest Star | Self - Author, Star Ancestors | |
| Thomas O. Mills | Guest Star | Self - Former Manager, Hopi Cultural Center Second Mesa | |
| Maximillien De Lafayette | Guest Star | Self - Author, UFOs and the Alien Agenda | |
| Alex Chionetti | Guest Star | Self - Author/Explorer | |
| Robert R. Cargill | Guest Star | Self - Biblical Archaeologist, UCLA | |
| Peter Fiebag | Guest Star | Self - Author/Lecturer | |
| George Noory | Guest Star | Self - Radio Host, Coast to Coast AM | |
| Michael J. Crowe | Guest Star | Self - Cavanaugh Prof. Emeritus, Univ. of Notre Dame | |
| David Childress | Guest Star | Self - Author, Technology of the Gods | |
| Graham Hancock | Guest Star | Self - Author, Fingerprints of the Gods | |
| William Bramley | Guest Star | Self - Author, The Gods of Eden | |
| Robert Schoch | Guest Star | Self - Geologist/Author | |
| Clifford Mahooty | Guest Star | Self - Zuni Tribal Elder | |
| Erich von Däniken | Guest Star | Self - Author, Chariots of the Gods | |
| Linda Moulton Howe | Guest Star | Self - Author/Investigative Journalist | |
| Christopher 'Chris' Pittman | Guest Star | Self - UFO Investigator | |
| Michael Stiller | Executive Producer | for History | |
| Kevin Burns | Executive Producer | ||
| Kim Sheerin | Executive Producer | Co-Executive Producer | |
| David Comtois | Executive Producer | Co-Executive Producer | |
| Scott Hartford | Executive Producer | Co-Executive Producer |