출연진
데이비드 애튼버러
Self - Narrator (archive sound)
Sean Carroll
Self - Narrator (archive sound)
Craig Childs
Self - Narrator (archive sound)
Brian Cox
Self - Narrator (archive sound)
Alex Filippenko
Self - Narrator (archive sound)
Stephen Hawking
Self - Narrator (archive sound)
Michio Kaku
Self - Narrator (archive sound)
Lawrence Krauss
Self - Narrator (archive sound)
Janna Levin
Self - Narrator (archive sound)
Phil Plait
Self - Narrator (archive sound)
Martin Rees
Self - Narrator (archive sound)
Mike Rowe
Self - Narrator (archive sound)
Michelle Thaller
Self - Narrator (archive sound)
Neil deGrasse Tyson
Self - Narrator (archive sound)