Michael Sean Erickson

饰：Self - Interviewee

Frank Drake

饰：Self - Frank Drake, PhD, Astronomer & Astrophysicist

Juliette Goodrich

饰：Self - Juliette Goodrich, Anchor

Doug Vakoch

饰：Self - Doug Vakoch, PhD, METI International President

夏洛特·劳斯

Charlotte Laws

饰：Self