Nature

• 
  George Page
  Self - Host
• 
  F. Murray Abraham
  Self - Narrator
• 
  David Attenborough
  Self - Presenter
• 
  Jayce Bartok
  Self - Narrator
• 
  John Benjamin Hickey
  Self - Narrator
• 
  Kevin Draine
  Self - Narrator
• 
  Gordon Buchanan
  Presenter
• 
  Donald Carl Johanson
  Self - Host
• 
  Niobe Thompson
  Self
• 
  Jacky Poon
  Self - Cameraman
• 
  Natalia Borrego
  Self
• 
  Howard Hall
  Self
• 
  Michele Hall
  Self
• 
  Julia Roberts
  Self
• 
  Ari Friedlaender
  Self
• 
  Liev Schreiber
  Self - Narrator
• 
  Lynn Sherr
  Self
• 
  Martin Nicholas
  Self
• 
• 
  Ray Coppinger
  Self - Professor, Hampshire College
• 
  James Serpell
  Self - zoologist, University of Pennsylvania
• 
  Susan Crockford
  Self - University of Victoria, BC
• 
  Joe Relph
  Self
• 
  Marc Bekoff
  Self
• 
  Alan Ereira
  Self (host)
• 
  David Scheel
  Self - Narrator
• 
  Will Benson
  Self
• 
  Tom Mustill
  Self
• 
  Thomas Haden Church
  Self - Narrator
• 
  Martin Dohrn
  Self

• Al Payson

• David Heeley
• John Downer
• Fred Kaufman
• Susan Fleming
• Wolfgang Bayer
• Allison Argo
• Mike Birkhead
• Kevin Bachar
• David Allen
• John Murray
• Tom Simon
• Ann Johnson Prum
• Ingrid Kvale
• Sally Thomson
• Mark Wheeler
• Tom Mustill
• Gavin Boyland
• Hugh Miles
• Alan McGregor
• Phil Agland
• Paul Atkins
• Michael Barry
• Sandy Ostertag
• Nigel Cole
• John Rubin
• Tim Liversedge
• Michael Schlamberger
• Harvey Jones
• Mark Deeble
• Victoria Stone

• Thomas Lovejoy
  ...
  (creator)
• George Page
  ...
  (creator)
• David Malakoff
  ...
  (writer)
• Janet Hess
  ...
  (writer)
• Jenette Restivo
  ...
  (writer)
• Kathy Svitil
  ...
  (writer)
• Mark Fletcher
• Joe Pontecorvo
• Allison Argo
  ...
  (writer)
• Barry Paine
  ...
  (writer)
• Susane Lee
  ...
  (writer)
• John Rubin
  ...
  (writer)
• Jason Kleinman
  ...
  (writer)
• Elizabeth Owen
  ...
  (writer)
• Jaime Bernanke
  ...
  (writer)
• Christopher Wade
  ...
  (writer)
• Gianna Savoie
  ...
  (writer)
• Angela Sakrison
  ...
  (writer)
• Elyse Eisenberg
  ...
  (writer)
• Kate Fulton
• Piyali Syam
• Siobhan Flanagan
  ...
  (writer)
• Kathleen Wisneski
• John Downer
• Karen de Sève
  ...
  (writer)
• John Uhl
  ...
  (writer)
• Doug Shultz
  ...
  (writer)
• Klaus Feichtenberger
• Tanner Vea
  ...
  (writer)
• Daniel Bernstein
  ...
  (writer)

• Chris Morgan
• Nora Young
• Paul Christie
• Nyambi Nyambi
• Brian Unger
• Allison Argo
• Olga Merediz
• Toby Leonard Moore
• Howard McGillin
• Jay O. Sanders
• Allan Peck
• Paul Giamatti
• Peter Coyote
• Craig Sechler
• Noma Dumezweni
• Uma Thurman
• James Naughton
• Steve Kroft
• Patricia Clarkson
• Daniel Stern
• Ana Gasteyer
• Campbell Scott
• Russell Boulter
• Ewan McGregor
• James Lurie
• Joe Hutto
• Kate Winslet
• Tom Harges
• Bert Pence
• Keith David