斯蒂文·格瑞尔

Steven M. Greer

饰：自己

Jeff Hawks

饰：Himself - Narrator

Dwynne Arnesson

饰：Himself

Harland Bentley

饰：Himself

Harold Brown

饰：Himself

Scott Carpenter

饰：Himself

Franklin Carter

饰：Himself

Trevor James Constable

饰：Himself

Philip J. Corso Jr.

饰：Himself

Philip Corso

饰：Himself

Gordon Creighton

饰：Himself

Paul Czysz

饰：Himself

Edgar D. Mitchell

饰：自己

Frank Borman

饰：Self, (archive footage)

道格拉斯·麦克阿瑟

Douglas MacArthur

饰：Self, (archive footage) (as General Douglas MacArthur)

Byron Palmer

饰：Self, (archive footage)

Ross Dedrickson

Ross Dedrickson

饰：Self,(archive footage) (as Colonel Ross Dedrickson)

德怀特·戴维·艾森豪威尔

Dwight D. Eisenhower

饰：Self,(archive footage) (as President Dwight D. Eisenhower)

若泽·埃斯卡米利亚

Jose Escamilla

饰：Self

George Filer

饰：Self,(archive footage) (as Maj. George A. Filer III)

Donna Hare

Donna Hare

饰：Self,(archive footage) (as Ms. Donna Hare)

Daniel Inouye

饰：Self,(archive footage) (as Senator Daniel Inouye)

Ted Loder

饰：Self,(archive footage) (as Professor Ted Loder)

Mark McCandlish

饰：Self,(archive footage) (as Mr. Mark McCandlish)

Robert Salas

饰：Self,(archive footage) (as Lt. Col. Robert Salas)

Martyn Stubbs

饰：Self

Gordon Cooper

饰：Self,(archive footage) (as Astronaut Gordon Cooper)

Glenn Dennis

饰：Self,(archive footage)

Laura Magdelene Eisenhower

饰：Self,(as Laura Eisenhower)

Richard F. Haines

饰：Self,(archive footage) (as Dr. Richard Haines)

J. Allen Hynek

饰：Self,(archive footage) (as Professor J. Allen Hyneck)

Donald E. Keyhoe

饰：Self,(archive footage) (as Major Donald E. Keyhoe)

Eugene Mallove

饰：Self,(archive footage) (as Dr. Eugene Mallove)

John Maynard

John Maynard

饰：Self,(archive footage) (as Mr. John Maynard)

Nick Pope

饰：Self,(archive footage)

Carol Rosin

Carol Rosin

饰：Self,(archive footage) (as Dr. Carol Rosin)

Daniel Salter

Daniel Salter

饰：Self,(archive footage)

Michael Schratt

饰：Self

Clifford E. Stone

Clifford E. Stone

饰：Self,(archive footage) (as Sgt. Clifford Stone)

Larry Warren

饰：Self,(archive footage)