Calificación
Reparto
Carl Sagan
Himself (archive footage)
John Casani
Himself
Lawrence Krauss
Himself
Carolyn Porco
Herself
Timothy Ferris
Himself
Edward Stone
Himself
Nick Sagan
Himself
Larry Soderblom
Himself
Charley Kohlhase
Himself
Fran Bagenal
Herself
James F. Bell
Himself
Frank Locatell
Himself
Suzanne Dodd
Herself
Jon Lomberg
Himself
Heidi Hammel
Herself
Candy Hansen
Herself
