史蒂芬·霍金

Stephen Hawking

饰：Himself

迈克尔·C·豪尔

Michael C. Hal

饰：Himself - Narrator

Krstin Baldwin

饰：Herself

Vincent Giampapa

饰：Himself

Robert Lanza

饰：Himself

Paul Lu

饰：Himself

Marco Seandel

饰：Himself

Doris Taylor

饰：Herself

Mark Tuszynski

饰：Himself