尼尔·德格拉塞·泰森

Neil deGrasse Tyson

饰：自己

Geoffrey Landis

饰：自己

David Ackroyd

饰：自己

马丁·里斯

Martin Rees

饰：自己

加来道雄

Michio Kaku

饰：自己

Erik Thompson

饰：自己

阿兰·古斯

Alan Guth

饰：自己

布赖恩·格林

Brian Greene

饰：自己

David Ackroyd

饰：Self - Narrator,

Nima Arkani-Hamed

饰：Self - Prof. Physics, Harvard University

Sterling Greene

Sterling Greene

饰：Early Man

Gerald Brodin

Gerald Brodin

饰：Nicholas Copernicus

John Polkinghorne

John Polkinghorne

饰：Self - Physicist and Anglican Priest

Maya Harvey

Maya Harvey

饰：Extra - Girl at Carnival

George Gamow

饰：Self - Physicist,(archive footage)

Edwin Hubble

饰：Self - Astronomer,(archive footage)

教皇皮乌斯十二世

Pope Pius XII

饰：Self - Proof of Biblical Genesis,(archive footage)

Maxie Santillan Jr.

饰：Shaman,(as Maxie J. Santillan Jr.)

劳伦斯·M.克劳斯

Lawrence M. Krauss

饰：Self - Author, 'Hiding in the Mirror'

Marcelo Gleiser

饰：Self - Prof. Physics & Astronomy, Dartmouth College

Wolfhard Schlosser

饰：Self - Prof. Astronomy, Bochum University

Owen Gingerich

饰：Self - Harvard-Smithsonian Center of Astrophysics

Jonathan Kelley

饰：Pope Urban VIII

James Casey

James Casey

饰：Isaac Newton

Glen McDougal

Glen McDougal

饰：Carnival Barker

麦克斯·泰格马克

Max Tegmark

饰：Self - Assoc. Prof. Physics, MIT

阿尔伯特·爱因斯坦

Albert Einstein

饰：Self - Theoretical Physicist,(archive footage)

弗雷德·霍伊尔

Fred Hoyle

饰：Self - Nucleosynthesis Theory and Steady State Theory,(archive footage)

Arno Penzias

饰：Self - Physicist, Radio Astronomer,(archive footage)