Robert McNeill Alexander
Himself - Leeds University (archive footage)

Luiz Alvarez
Himself - University of California (archive footage)

David Archibald
Himself - San Diego State University (archive footage) (as Prof David Archibald)

Claire Belcher
Herself - Royal Holloway, University of London (archive footage)

Brent Breithaupt
Himself - Palaeontologist (archive footage)

Chris Brochu
Himself - University of Iowa (archive footage)

Julia Clarke
Herself - Palaeontologist (archive footage)

Philip Currie
Himself - Palaeontologist (archive footage)

Kristi Curry Rogers
Herself - Palaeontologist (archive footage)

Cesare Emiliani
Himself - Professor of Geology, University of Miami (archive footage)

Gregory Erickson
Himself - Florida State University (archive footage)

Alan Feduccia
Himself - University of California (archive footage)

Alan Hildebrand
Himself - Geological Survey of Canada (archive footage)

Florence McGovern
Herself - Fossil Dealer (archive footage)

Angela Milner
Herself - Natural History Museum (archive footage)

Simon Conway Morris
Himself - Evolutionary Palaeobiologist (archive footage)

John Ostrom
Himself - Yale University (archive footage)

Tim Rowe
Himself - University of Texas (archive footage)

Dale A. Russell
Himself - Paleobiologist, National Museums of Canada (archive footage)