Victor Buono
Homer The Archivist
Rick Overton
Ino The Computer (voice)
Carl Sagan
Self
Isaac Asimov
Self
Eugene Cernan
Self (archive footage)
Bernard J. Carr
Self (as Dr. Bernard Carr)
Frank Drake
Self (as Dr. Frank Drake)
Ronald E. Evans
Self (archive footage)
Joost Van Rees
Target... Earth?
Released
Bande-annonce
