Reparto (8)
Barbara FeldonNarrator (voice)
Robert BakkerSelf - CommentorJack HornerSelf - CommentorPaul SerenoSelf - CommentorJames FarlowSelf - PaleontologistMartin RudwickSelf - Historian of ScienceDavid NormanSelfMichael NovacekSelf - Dean of Science