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 | |
|---|---|---|---|
| Kevin Burns | Writer | ||
| Brian Coughlin | Writer | ||
| Frankie Glass | Writer | ||
| Frankie Glass | Producer | ||
| Kellie Dancho | Producer | Co-Producer | |
| 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 | |
| Nick Pope | Guest Star | Self - British Ministry of Defence (1985-2006) | |
| Robert H. Frisbee | Guest Star | Self - Propulsion Systems Engineer, NASA-JPL, Ret. | |
| George Noory | Guest Star | Self - Radio Host, Coast to Coast AM | |
| Jeff Peckman | Guest Star | Self - Political Activist/UFO Journalist | |
| Michael Cremo | Guest Star | Self - Author, Forbidden Archaeology | |
| 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 | |
| Graham Hancock | Guest Star | Self - Author, Fingerprints of the Gods | |
| Albert A. Harrison | Guest Star | Self - Prof. Emeritus of Social Psychology, UC Davis | |
| 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. | |
| 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 | |
| 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 |