Erik Thompson

Narrator

Acting

Paul Davies

Self - Physicist, Author, 'The Mind of God'

Acting

Robert R. Cargill

Self - University of Iowa

Acting

Alex Filippenko

Self - Univ. of California, Berkeley

Acting

Laura Danly

Self - Griffith Observatory

Acting

Clifford V. Johnson

Self - Univ. of Southern California

Acting

Robert Spitzer

Self - Magis Center of Reason and Faith

Acting

Leonard Mlodinow

Self - Co-Author, 'The Grand Design'

Writing

Stephen Hawking

Self - Co-Author, 'The Grand Design'

Acting

Dana Smelzer

Acting