 | Seth Adams | ... | Himself - Dewey-Humbolt, Arizona |
| Steve Allen | ... | Himself - Stephenville, Texas |
| Kenneth Arnold | ... | Himself - Pilot, 1947 Witness (archive footage) |
| Bob Ball | ... | Himself (voice) (archive footage) (as MSgt Ball) |
| Frances Emma Barwood | ... | Herself (archive footage) |
| William J. Birnes | ... | Himself - The History Channel (as Bill Birnes) |
| Ray Bowyer | ... | Himself - Aurigny Airlines, Guernsey, UK (also archive footage) (as Captain Ray Bowyer) |
| John F. Burroughs | ... | Himself - U.S. Air Force, Ret. |
| Edward Cabansag | ... | Himself - U.S. Air Force, Ret. |
| John Callahan | ... | Himself - Federal Aviation Admin., Ret. |
| R.J. Childerhose | ... | Himself - RCAF Pilot (voice) (archive footage) |
| Anthony Choy | ... | Himself - Investigator for Peruvian Air Force (as Dr. Anthony Choy) |
| Anderson Cooper | ... | Himself (archive footage) |
| Gordon Cooper | ... | Himself - Mercury 7 Astronaut, Ret. (archive footage) (as Col. Gordon Cooper) |
| George Daglish | ... | Himself - Doctor of Applied Mathematics |
| Wilfried de Brouwer | ... | Himself - Major General, Belgian Air Force, Ret. |
| Jean-Charles Duboc | ... | Himself - Captain, Air France, Ret. (as Jean Charles Duboc) |
| Gerald Ford | ... | Himself (voice) (archive footage) (as Congressman Gerald Ford) |
| Mike Fortson | ... | Himself - Chandler, Arizona |
| James Fox | ... | Himself - Presenter (also archive footage) |
| Lee Roy Gaitan | ... | Himself - Constable, Stephenville, Texas (as Lee Roy Gaiten) |
| Rodrigo Bravo Garrido | ... | Himself - Captain, Aviation Army of Chile |
| Geraldine Greiner | ... | Herself - Phoenix, Arizona |
| Richard Hall | ... | Himself - national Investigation on Aerial Phenomena |
| Charles I. Halt | ... | Himself - Col. U.S. Air Force, Ret. (also archive footage) |
| John Haynes | ... | Himself - U.S. Air Force, 1997 (archive footage) (as Col. John Haynes) |
| Peter Hill-Norton | ... | Himself - Former Chief of Defence Staff (archive footage) (as Admiral Lord Hill Norton) |
| Russell Hookey | ... | Himself - Newsreader (archive footage) |
| J. Allen Hynek | ... | Himself - Scientific Consultant, U.S. Air Force (1948-69) (archive footage) (as Dr. J. Allen Hynek) |
| David Jacques | ... | Himself - Stephenville, Texas |
| Parviz Jafari | ... | Himself - General, Iranian Air Force, Ret. |
| Logan Johnston | ... | Himself - Phoenix, Arizona |
| Trig Johnston | ... | Himself - Captain, Northwest Airlines, Ret. |
| Angelia Joiner | ... | Herself - Reporter, Empire Tribune (as Angela Joiner) |
| Donald E. Keyhoe | ... | Himself - Marine Corps, Ret. 1966 (archive footage) (as Major Donald Keyhoe) |
| Dennis Kucinich | ... | Himself (archive footage) (as Rep. Dennis Kucinich) |
| Denis Letty | ... | Himself - French Air Force, Ret. (as General Denis Letty) |
| Hal Ley | ... | Himself - Phoenix, Arizona |
| Tim Ley | ... | Himself - Phoenix, Arizona (as Tim Lay) |
| Oscar Santa Maria | ... | Himself - Peruvian Air Force, Ret. |
| John McCain | ... | Himself (voice) (archive footage) (as Senator John McCain) |
| Edgar D. Mitchell | ... | Himself - Apollo 14 Astronaut (also archive footage) (as Dr. Edgar Mitchell) |
| Kristina Moore | ... | Herself - Newsreader (archive footage) |
| Monroe Nevels | ... | Himself - U.S. Air Force, Ret. (also archive footage) (as Sgt. Monroe Nevels) |
| Jaques Patenet | ... | Himself - Director CNES, France |
| James Penniston | ... | Himself - U.S. Air Force, Ret. (as Sgt. James Penniston) |
| Claude Poher | ... | Himself - Founder GEPAN, France |
| Nick Pope | ... | Himself - Ministry of Defence, UK, Ret. |
| Bob Pozzuoli | ... | Himself - Lake Carmel, New York 1983 (archive footage) |
| Laurie Pozzuoli | ... | Herself - Lake Carmel, New York 1983 (archive footage) (as Wife) |
| Hector Quintanilla | ... | Himself - Project Blue Book, U.S. Air Force, 1960 (archive footage) (as Major Hector Quintanilla) |
| Jean-Claude Ribes | ... | Himself - Astrophysicist, France (as Dr. Jean-Claude Ribes) |
| Emily Roads | ... | Herself - Tuscon, Arizona |
| Stacey Roads | ... | Herself - Tuscon, Arizona |
| Brian Rooney | ... | Himself - ABC News, Nightline (archive footage) |
| John Russell | ... | Himself - Passenger |
| Kate Russell | ... | Herself - Passenger |
| John Samford | ... | Himself - U.S. Air Force (archive footage) (as General John Samford) |
| Ricky Sorrells | ... | Himself - Stephenville, Texas |
| Fife Symington | ... | Himself - Former Governor of Arizona (also archive footage) |
| Lawrence Tacker | ... | Himself - U.S. Air Force, 1960 (archive footage) (as Col. Lawrence Tacker) |
| Evelyn Trent | ... | Herself - 1950 Eyewitness (archive footage) (as Mrs. Trent) |
| Harry S. Truman | ... | Himself (archive footage) (as President Harry Truman) |
| Damien Turnidge | ... | Himself - Phoenix, Arizona |
| Brian Watson | ... | Himself - Phoenix, Arizona |
| Erin Watson | ... | Herself - Phoenix, Arizona |
| Sue Watson | ... | Herself - Phoenix, Arizona |
| Joseph Wershba | ... | Himself - CBS Reporter, 1966 (archive footage) |
| Gordon E. Williams | ... | Himself - U.S. Air Force, Ret. (as Gen. Gordon E. Williams) |
| Jimmy Carter | ... | Himself (uncredited) |
| Leslie Kean | ... | Herself - UFO Researcher (uncredited) |
| Larry King | ... | Himself (archive footage) (uncredited) |
| Patti Kirkpatrick | ... | Herself - News Anchor (archive footage) (uncredited) |
| Renato Nicolai | ... | Himself (archive footage) (uncredited) |
| John Podesta | ... | Himself (archive footage) (uncredited) |
| Gary Tuchman | ... | Himself - CNN Reporter (uncredited) |
company.