John F. Burroughs

饰：Self - U.S. Air Force, Ret.

Edward Cabansag

饰：Self - U.S. Air Force, Ret.

R.J. Childerhose

饰：Self - RCAF Pilot

Anthony Choy

饰：Self - Investigator for Peruvian Air Force,(as Dr. Anthony Choy)

George Daglish

饰：Self - Doctor of Applied Mathematics

Kenneth Arnold

饰：Himself - Pilot, 1947 Witness

Frances Emma Barwood

饰：Herself

William J. Birnes

William J. Birnes

饰：Himself - The History Channel

安德森·库珀

Anderson Cooper

饰：Himself

约翰·麦凯恩

John McCain

饰：Self, (archive footage) (as Senator John McCain)

杰拉尔德·福特

Gerald Ford

饰：Self, (archive footage) (as Congressman Gerald Ford)

Mike Fortson

饰：Self - Chandler, Arizona

Lee Roy Gaitan

饰：Self - Constable, Stephenville, Texas,(as Lee Roy Gaiten)

Charles I. Halt

饰：Self - Col. U.S. Air Force, Ret.

Peter Hill-Norton

饰：Self - Former Chief of Defence Staff (1970-77),(archive footage) (as Admiral Lord Hill Norton)

J. Allen Hynek

饰：Self - Scientific Consultant, U.S. Air Force (1948-69),(archive footage) (as Dr. J. Allen Hynek)

Trig Johnston

饰：Self - Captain, Northwest Airlines, Ret.

Donald E. Keyhoe

饰：Self - Marine Corps, Ret. 1966,(archive footage) (as Major Donald Keyhoe)

Tim Ley

饰：Self - Phoenix, Arizona,(as Tim Lay)

Hector Quintanilla Jr.

饰：Self - Project Blue Book, U.S. Air Force, 1960,(archive footage) (as Major Hector Quintanilla)

哈里·S·杜鲁门

Harry S. Truman

饰：Self,(archive footage) (as President Harry Truman)

Gordon Cooper

饰：Self - Mercury 7 Astronaut, Ret.,(archive footage) (as Col. Gordon Cooper)

Wilfried de Brouwer

饰：Self - Major General, Belgian Air Force, Ret.

Rodrigo Bravo Garrido

饰：Self - Captain, Aviation Army of Chile

Angelia Joiner

饰：Self - Reporter, Empire Tribune,(as Angela Joiner)

丹尼斯·库钦奇

Dennis Kucinich

饰：Self,(archive footage)

Edgar D. Mitchell

饰：Self - Apollo 14 Astronaut,(as Dr. Edgar Mitchell)

Monroe Nevels

饰：Self - U.S. Air Force, Ret.,(as Sgt. Monroe Nevels)

James Penniston

饰：Self - U.S. Air Force, Ret.,(as Sgt. James Penniston)

Nick Pope

饰：Self - Ministry of Defence, UK, Ret.

John Samford

饰：Self - U.S. Air Force,(archive footage) (as General John Samford)

Joseph Wershba

饰：Self - CBS Reporter, 1966,(archive footage)