There is evidence that suggests we experienced 20th century alien contact. In 1942, the Battle of Los Angeles involved the US military and Air Defense allegedly fighting a UFO. WWII Allied Air Force planes were buzzed by balls of light that some think could have been extraterrestrial. And the alleged crash of a flying saucer in Roswell, New Mexico in 1947 propelled the world into the age of UFOs. For decades, some people have been searching for the sounds of extraterrestrial intelligence, while others have been sending messages out into deep space. What would happen if aliens answered... or came calling? What protocols exist to determine who would speak on behalf of mankind, and how might we communicate? What happens if they return? Some believe they already have.
| Name | Type | Role | |
|---|---|---|---|
| Brian Coughlin | Writer | ||
| Frankie Glass | Writer | ||
| Kevin Burns | Writer | ||
| Frankie Glass | Producer | ||
| Kellie Dancho | Producer | Co-Producer | |
| David Childress | Guest Star | Self - Author, Technology of the Gods | |
| Giorgio A. Tsoukalos | Guest Star | Self - Publisher, Legendary Times Magazine | |
| Robert R. Cargill | Guest Star | Self - Biblical Archaeologist, UCLA | |
| William Bramley | Guest Star | Self - Author, The Gods of Eden | |
| C. Scott Littleton | Guest Star | Self - Witness, Battle of Los Angeles | |
| Sara Seager | Guest Star | Self - Prof. of Planetary Sciences, MIT | |
| Christopher 'Chris ' J. Corbally | Guest Star | Self - Vice Director, Vatican Observatory | |
| L.A. Marzulli | Guest Star | Self - Author, The Alien Interviews | |
| Brad Bebout | Guest Star | Self - Research Scientist, NASA Ames Research Center | |
| Ted Peters | Guest Star | Self - Prof. of Theology, Pacific Lutheran Theological Seminary | |
| Dorothy Matich | Guest Star | Self - Witness, Battle of Los Angeles | |
| Jennifer Heldmann | Guest Star | Self - Planetary Scientist, NASA Ames Research Center | |
| Erich von Däniken | Guest Star | Self - Author, Chariots of the Gods | |
| Robert H. Frisbee | Guest Star | Self - Propulsion Systems Engineer, NASA-JPL, Ret. | |
| Nick Pope | Guest Star | Self - British Ministry of Defence (1985-2006) | |
| George Noory | Guest Star | Self - Radio Host, Coast to Coast AM | |
| Michael Cremo | Guest Star | Self - Author, Forbidden Archaeology | |
| Jeff Peckman | Guest Star | Self - Political Activist/UFO Journalist | |
| Robert Bauval | Guest Star | Self - Author, The Egypt Code | |
| Albert W. Metz | Guest Star | Self - Witness, Battle of Los Angeles | |
| Bill Birnes | Guest Star | Self - Author/UFO Investigator | |
| Philip Coppens | Guest Star | Self - Author/Investigative Journalist | |
| Linda Moulton Howe | Guest Star | Self - Author/Investigative Journalist | |
| Paul Levinson | Guest Star | Self - Prof. of Media Studies, Fordham Univ. | |
| Paul Davies | Guest Star | Self - Theoretical Physicist, Arizona State Univ. | |
| Steven M. Greer | Guest Star | Self - Director, The Disclosure Project | |
| Tom Horsfall | Guest Star | Self - Witness, Battle of Los Angeles | |
| Albert A. Harrison | Guest Star | Self - Prof. Emeritus of Social Psychology, UC Davis | |
| Graham Hancock | Guest Star | Self - Author, Fingerprints of the Gods | |
| Julie Shuster | Guest Star | Self - Executive Director, International UFO Museum | |
| Christopher 'Chris' Pittman | Guest Star | Self - UFO Investigator | |
| Michael Dennin | Guest Star | Self - Physicist, UC Irvine | |
| William J. Fulco | Guest Star | Self - Archaeologist, Loyola Marymount Univ. | |
| 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 |