Nicola Clayton

饰：(as Professor Nicola Clayton)

Gerald Joyce

饰：(as Professor Gerald Joyce)

Jill Tarter

饰：(as Dr Jill Tarter)

Felisa Wolfe-Simon

达拉斯·坎贝尔

Dallas Campbell

饰：Himself - Presenter

Frank Drake

饰：Himself - SETI Founder

Simon Conway Morris

饰：Himself - University of Cambridge