NOVA

Neil Ross

Narrator

Liev Schreiber

Narrator (voice)

Craig Sechler

Narrator

Will Lyman

Narrator

Stacy Keach

Narrator

David Ogden Stiers

Narrator

Brian Greene

Host

John Lithgow

Narrator

Neil deGrasse Tyson

Self - Host

Peter Thomas

Narrator

Richard Donat

Narrator

Corey Johnson

Narrator

Richard Smith

Host

Jamie Effros

Narrator

Kathryn Walker

Narrator

Demetri Goritsas

Narrator

Ted Marcoux

Narrator

Eric Meyers

Narrator

David Attenborough

Narrator

Joe Morton

Narrator

Roy Scheider

Narrator

Kirk Johnson

Host

Valerie Harper

Self

Stockard Channing

Self - Bible Reader

Christian Pedersen

Gustav Wiik

Oliver Platt

Narrator

Ian Holm

Narrator

Martin Jarvis

Narrator (voice)

Courtney B. Vance

Narrator

Bray Poor

Narrator

Michael Scott

Narrator

Jim Carter

Narrator

Henry Ian Cusick

Charles Darwin

Frances O'Connor

Emma Darwin

Nigel Bennett

Sir Charles Lyell

Rushmore DeNooyer

Narrator

Mark Oliver Everett

Himself

John Benjamin Hickey

Narrator

Alan Yentob

Narrator

Ray Magliozzi

Host

Tom Magliozzi

Host

Harrison Ford

Narrator

E.O. Wilson

Himself

Ruben Santiago-Hudson

Percy Julian

Aidan McArdle

Albert Einstein

Shirley Henderson

Mileva Maric

Steven Robertson

Michael Faraday

Julian Rhind-Tutt

Antoine Lavoisier

Ty Glaser

Marie Anne Lavoisier

Anton Lesser

Voltaire

Emily Woof

Lise Meitner

Alex Macqueen

Chater

Samuel West

Humphry Davy

Philip Herbert

Count de Amerval

F. Murray Abraham

Narrator

Scott Handy

Isaac Newton

Maureen Bennett

Lady Franklin

Bohdan Poraj

Francis Crozier

Darri Ingolfsson

Godfred Hansen

Jere Shea

George Soper

Keith David

Narrator

Simon Callow

Galileo

Laura Nardi

Maria Celeste

John Fraser

Inquisitor

Alexa Jago

Voice of Maria Celeste

Sigourney Weaver

Narrator

Vladimir Pozner

Host

William Hootkins

Voice of Methuselah

Derek Jacobi

Voice of Ernest Shackleton

Susan Sarandon

Narrator (voice)

Héctor Elizondo

Narrator

Hal Linden

Narrator

John Hurt

Narrator

Rebecca De Mornay

Narrator

Sally Kellerman

Narrator

Jeremy Akerman

Parslow

Jan Maxwell

Narrator

Lee Rogers Berger

Himself

Kostas Baras

John Hawks

Himself

Zachary Quinto

Narrator

Laurence Golborne

Self

Talithia Williams

Self - Narrator

Robert Michelson

Self

Reinhard Genzel

Self

Manfred von Richthofen

Self (archive footage)

William H. Whyte

Self

James R. Schlesinger

Self (archive footage)

Heather Berlin

Self

George Pataki

Self

Carl Sagan

Dr. John E. Mack

Self - Psychiatry, Harvard Medical School

Tony Robinson

Younger Ernie

Anita Carey

Joey's Mother

Mark Wing-Davey

Joey's Father

Maureen Stapleton

Narrator (voice)

William Franklyn

Narrator (voice)

Forbes Collins

Iakovlev

Noel Davis

Scientist

Joseph Campanella

Narrator (voice)

David Suzuki

Narrator (voice)

Robert D. Ballard

Self

Martin K.A. Morgan

Self