彼德·考约特
Peter Coyote
饰：Narrator,
Amir D. Aczel
饰：Himself
Dwynne Arnesson
饰：Himself
Marc Bailey
饰：Himself
Frances Emma Barwood
饰：Herself
Graham Bethune
饰：Himself
Georgina Bruni
饰：Herself
John F. Burroughs
饰：Himself
Edward Cabansag
饰：Himself
Philip Corso
饰：Himself
吉米·卡特
Jimmy Carter
饰：Himself
John Callahan
饰：自己
詹姆斯·福克斯
James Fox
饰：Himself
Charles Brown
Charles Brown
饰：自己
Gordon Cooper
饰：自己
Monroe Nevels
饰：Self, (archive footage) (as Sgt Nevilles)
Bruce Englund
饰：Self, (archive footage) (as Lt. Englund)
Tim Ley
饰：Self - Phoenix, Arizona
Trig Johnston
饰：Self - Retired Captain, Northwest Airlines
哈里·S·杜鲁门
Harry S. Truman
饰：Self,(archive footage)
Edgar D. Mitchell
饰：Self - Apollo 14 Astronaut,(as Edgar Mitchell)
Robert Salas
饰：Self - Lt. Col., Strategic Air Command Launch Controller
James Penniston
饰：Self - Sgt. (Ret), U.S. Air Force,(as Jim Penniston)
Charles I. Halt
饰：Self - Lt. Col. (Ret), U.S. Air Force,(as Charles Halt)
Nick Pope
饰：Self - Former UFO Investigator, Ministry of Defence, UK
David Kingston
饰：Self - Somerset, England
沃尔特
Walter Cronkite
饰：Self,(archive footage)
J. Allen Hynek
饰：Self - Scientific Adviser, Project Blue Book,(archive footage)
Donald E. Keyhoe
饰：Self - Former Marine Corps Major,(archive footage) (as Donald Keyhoe)
德怀特·戴维·艾森豪威尔
Dwight D. Eisenhower
饰：Self,(archive footage)
比尔·克林顿
Bill Clinton
饰：Self,(archive footage)
Renato Nicolai
饰：Self - Trans-en-Provence, France
Elaine Quijano
饰：Self,(archive footage)
John Podesta
饰：Self - Former White House Chief of Staff,(archive footage)
John Samford
饰：Self - General, U.S. Air Force,(archive footage)
Mike Fortson
饰：Self - Chandler, Arizona
Stanton Friedman
饰：Self - Nuclear Physicist and UFO Investigator,(as Stanton T. Friedman)
Richard Dolan
Richard Dolan
饰：Self - Historian and Author of 'UFOs and the National Security State',(as Richard M. Dolan)
布赖恩·格林
Brian Greene
饰：Self - Physics Professor and Author of 'The Elegant Universe'
Michael Lindemann
饰：Self - Research Journalist
罗纳德·威尔逊·里根
Ronald Wilson Reagan
饰：Self,(archive footage)
Peter Hill-Norton
饰：Self - Admiral, Former Chief of Defense Staff, U.K.,(as Lord Hill Norton)
比尔·乔治
Bill George
饰：Self - Visual Effects Supervisor, Industrial Light & Magic
杰拉尔德·福特
Gerald Ford
饰：Self,(archive footage)
Hector Quintanilla Jr.
饰：Self - Head of Project Blue Book, U.S. Air Force,(archive footage) (as Hectar Quintanilla)
Steven Schiff
饰：Self - Congressman, New Mexico,(archive footage)
Leslie Kean
饰：Self - Author and Journalist