伊安·霍姆

Ian Holm

饰：Self - Narrator,

Vera C. Rubin

饰：Self,(as Dr. Vera Rubin)

Saul Perlmutter

饰：Self,(as Prof. Saul Perlmutter)

David Spergel

饰：Self,(as Prof. David Spergel)

Carlos Frenk

饰：Self,(as Prof. Carlos Frenk)