Cast 14

1. 

   David Attenborough

   Narrator (archive sound)

2. 

   Sean Carroll

   Narrator (archive sound)

3. Craig Childs

   Narrator (archive sound)

4. 

   Brian Cox

   Narrator (archive sound)

5. Alex Filippenko

   Narrator (archive sound)

6. 

   Stephen Hawking

   Narrator (archive sound)

7. 

   Michio Kaku

   Narrator (archive sound)

8. 

   Lawrence Krauss

   Narrator (archive sound)

9. 

   Janna Levin

   Narrator (archive sound)

10. 

    Phil Plait

    Narrator (archive sound)

11. 

    Martin Rees

    Narrator (archive sound)

12. Mike Rowe

    Narrator (archive sound)

13. 

    Michelle Thaller

    Narrator (archive sound)

14. 

    Neil deGrasse Tyson

    Narrator (archive sound)

Crew 4