Himself - Presenter
Himself - Leeds University (archive footage)
Himself - University of California (archive footage)
Himself - San Diego State University (archive footage) (as Prof David Archibald)
Herself - Royal Holloway, University of London (archive footage)
Himself - Palaeontologist (archive footage)
Himself - University of Iowa (archive footage)
Herself - Palaeontologist (archive footage)
Himself - Palaeontologist (archive footage)
Herself - Palaeontologist (archive footage)
Himself - Professor of Geology, University of Miami (archive footage)
Himself - Florida State University (archive footage)
