| Person | Type | Job | Role(s) |
|---|---|---|---|
 Penny Palmer | Crew | Directing | Director, Producer |
Sacha Baveystock | Crew | Production | Executive Producer |
Brent Breithaupt | Cast | Himself - Palaeontologist (archive footage) | |
 Dallas Campbell | Cast | Actor | Himself - Presenter |
Angela Milner | Cast | Herself - Natural History Museum (archive footage) | |
Chris Brochu | Cast | Himself - University of Iowa (archive footage) | |
Dale A. Russell | Cast | Himself - Paleobiologist, National Museums of Canada (archive footage) | |
Florence McGovern | Cast | Herself - Fossil Dealer (archive footage) | |
Gregory Erickson | Cast | Himself - Florida State University (archive footage) | |
Robert McNeill Alexander | Cast | Himself - Leeds University (archive footage) | |
Simon Conway Morris | Cast | Himself - Evolutionary Palaeobiologist (archive footage) | |
Tim Rowe | Cast | Himself - University of Texas (archive footage) | |
Alan Hildebrand | Cast | Himself - Geological Survey of Canada (archive footage) | |
John Ostrom | Cast | Himself - Yale University (archive footage) | |
Kristi Curry Rogers | Cast | Herself - Palaeontologist (archive footage) | |
Alan Feduccia | Cast | Himself - University of California (archive footage) | |
Cesare Emiliani | Cast | Himself - Professor of Geology, University of Miami (archive footage) | |
Claire Belcher | Cast | Herself - Royal Holloway, University of London (archive footage) | |
David Archibald | Cast | Himself - San Diego State University (archive footage) (as Prof David Archibald) | |
Julia Clarke | Cast | Herself - Palaeontologist (archive footage) | |
Luiz Alvarez | Cast | Himself - University of California (archive footage) | |
Philip Currie | Cast | Himself - Palaeontologist (archive footage) | |
| Person | Type | Job | Role(s) |
