Steven Macintosh

饰：Narrator

John C. Lilly

饰：Himself, scientist

杰夫·布里吉斯

Jeff Bridges

饰：Himself, John C. Lilly`s friend

D. Graham Burnett

饰：Himself, historian of science

Mary Lilly

饰：Herself, John C. Lilly`s wife

Frank Drake

饰：Himself, astronomer

Gregory Bateson

饰：Himself, anthropologist

Lois Bateson

饰：Herself, Gregory Bateson`s wife

Eric Vatikiotis-Bateson

饰：Himself, Gregory Bateson`s adopted son

Andy Williamson

饰：Himself, veterinarian

Margaret Howe Lovatt

饰：Herself

Sissy

饰：Herself, dolphin

Richard O'Barry

Richard O'Barry

饰：Self - John C. Lilly's friend

Jack Paar

饰：Self,(archive footage)

卡尔·萨根

Carl Sagan

饰：Self - astronomer,(archive footage)