- Craig Sechler
- Self - Narrator
- Stephen Wroe
- Self - Megafauna Expert, University of New South Wales
- Gavin Prideaux
- Self - Paleontologist, Western Australian Museum
- Judith Field
- Self - Archaeologist, University of Sydney
- Gifford H. Miller
- Self - Professor of Geological Sciences, University of Colorado
- John Magee
- Self - Research Fellow Earth Sciences, Australian National University
- Jean Le Loeuff
- Self - Director of Musée des Dinosaures d'Espéraza
- Eric Buffetaut
- Self - Paleontologist, Center for National Scientific Research France
- Richard Roberts
- Self - Geochronologist, University of Wollongong
- Linda Ayliffe
- Self - Geophysicist, Australian National University
- Lotti Williams
- Self - Paakantyi Tribal Elder
- Matt Cupper
- Self - Archaeologist, University of Melbourne
- Warren Clark
- Self - Joint Management Co-Coordinator, Mungo National Park
- Tim Barrows
- Self - Paleoclimatologist
- Peter Murray
- Self - Paleontologist, Museum of Central Australia
- Roy Barker
- Self - Tribal Elder, Murawari Weaponry Expert
- Heath Bergersen
- Early Human
- Trevor Jamieson
- Early Human
- Don Abernathy
- Museum Tourist
