Mazlan Othman

饰：Herself, astrophysicist, director of the United Nations Office f

Janos Tisovszky

饰：Himself, director of the United Nations Information Service

Michael Boyce

饰：Himself, former Chief of the Defence Staff

Niklas Hedman

饰：Himself, The United Nations Office for Outer Space Affairs

Sheryl Bishop

饰：Herself, social psychologist, University of Texas

John D. Rummel

饰：Himself, chairman, Committee on Space Research

Doug Vakoch

饰：Himself, director of Search for Extra-Terrestrial Intelligence

Jacques Arnould

饰：Himself, theologist, Centre National d`Etudes Spatiales

Vickie Sheriff

饰：Herself, former UK prime minister`s deputy official spokeswoman

Ernst Fasan

饰：Himself, authority in space law

Michael Dangl

饰：Narrator,

Christian Reiner

Christian Reiner

饰：Narrator,

库尔特·瓦尔德海姆

Kurt Waldheim

饰：Self,(archive footage) (as Dr. Kurt Waldheim)