출연진
칼 세이건
Self (archive footage)
John Casani
Self
Lawrence Krauss
Self
Carolyn Porco
Self
Timothy Ferris
Self
Edward Stone
Self
Nick Sagan
Self
Larry Soderblom
Self
Charley Kohlhase
Self
Fran Bagenal
Self
James F. Bell
Self
Frank Locatell
Self
Suzanne Dodd
Self
Jon Lomberg
Self
Heidi Hammel
Self
Candy Hansen
Herself
Andrew Ingersoll
Himself
Dave Linick
Himself
Fernando Peralta
Himself
Linda J. Spilker
Herself
Tom Spilker
Himself