Christian Rodska
В роли:  Narrator (13 episodes, 2003)

Jeremy Rayner
В роли:  Себя - Alexander Professor of Zoology, University of Leeds, UK (8 episodes, 2003)

Bruce H. Tiffney
В роли:  Себя - Palaeobotanist, University of California, USA (8 episodes, 2003)

Stephen Harris
В роли:  Себя - Mammalogist, Bristol University, UK (5 episodes, 2003)

Stephen R. Palumbi
В роли:  Себя - Professor in Marine Sciences, Harvard University, USA (5 episodes, 2003)

Taylor Abrahamse
В роли: (5 episodes, 2007-2008)

Марк Донато
В роли: (5 episodes, 2007-2008)

Ashley Peters
В роли: (5 episodes, 2007-2008)

Richard Fortey
В роли:  Себя - Senior Palaeontologist, The Natural History Museum, UK (4 episodes, 2003)

William Gilly
В роли:  Себя - Cell and Developmental Biology and Marine Biology (3 episodes, 2003)

Mike Linley
В роли:  Себя - Herpetologist (3 episodes, 2003)

Philip Currie
В роли:  Себя - Palaeoornithologist, Royal Tyrell Museum of Palaeontology, Canada (2 episodes, 2003)

Leticia Aviles
В роли:  Себя - Evolutionary Biologist, University of Arizona (1 episode, 2003)

Robert McNeill Alexander
В роли:  Себя - Biomechanics Specialist, Leeds University, UK (unknown episodes)

Phillip Currie
В роли:  Себя - Palaeoornithologist, Royal Tyrell Museum of Palaeontology, Canada (unknown episodes)

Kurt M. Kotrschal
В роли:  Себя - Zoological Institute, University of Vienna, Austria (unknown episodes)

Roy Livermore
В роли:  Себя - Palaeongeographer, British Antarctic Survey, UK (unknown episodes)

Karl J. Niklas
В роли:  Себя - Professor of Plant Biology, Cornell University, USA (unknown episodes)

Stephen Sparks
В роли:  Себя - Professor of Geology, University of Bristol (unknown episodes)

Paul Valdes
В роли:  Себя - Palaeoclimatologist, Reading University, UK (unknown episodes)