James Garvin
Self
Stephen Hawking
Self
Michio Kaku
Self
George Lucas
Self
John C. McGinley
Narrator
Wayne D. Barlowe
Self
Curtis Clark
Self
Jamie Haines
Self
Jack Horner
Self
Joan Horvath
Self
Victoria Meadows
Self
David Moriarty
Self
Randy Pollock
Self
J. Craig Venter
Self
James Kirkland
Self
