Main Characters
Recurring Guest Characters
Richard Dawkins
1 guest appearances
Jimmy Carter
1 guest appearances
Chris Hadfield
1 guest appearances
Biz Stone
1 guest appearances
Charles Bolden
1 guest appearances
Norman Lear
1 guest appearances
Bill Clinton
1 guest appearances
Larry Wilmore
1 guest appearances
Seth Macfarlane
1 guest appearances
David Byrne
1 guest appearances
David Crosby
1 guest appearances
Brian Cox
1 guest appearances
Gina McCarthy
1 guest appearances
Kevin Smith
1 guest appearances
Arati Prabhakar
1 guest appearances
Sharon Weinberger
1 guest appearances
Natalie Panek
1 guest appearances
Hod Lipson
1 guest appearances
Filmmaker/Explorer
1 guest appearances