Target... Earth?

维克多·布鲁诺

Homer The Archivist

里克·奥弗顿

Ino The Computer (voice)

卡尔·萨根

Self

艾萨克·阿西莫夫

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)