史蒂芬·霍金

Stephen Hawking

饰：Himself

Arjun Singh Panam

饰：Arjun Singh Panam

David Charbonneau

饰：Self - Astronomer

Alex Filippenko

饰：Self

Sian Proctor

饰：Volunteer

Seth Shostak

饰：Self - Astronomer

Francisco Diego

饰：Self - Astronomer