Tim BirkettSelf - Narrator Michael GottfriedSelf - Michigan State University Chuck CiampaglioSelf - Wright State University Stephen GodfreySelf - Calvert Marine Museum Guillermo AguirrezabalaSelf - student Bretton W. KentSelf - University of Maryland Ryan JohnsonSelf - South African Marine Predator Lab John BabiarzSelf - fossil collector Greg McDonaldSelf - National Park Service Irv QuitmyerSelf - Florida Museum of Natural History Gordon HubbellSelf - Fossil Collector Jim MelliSelf - South Dakota Natural History Museum Gregory RetallackSelf - geologist Geordie DucklerSelf - palaentologist Lawrence BarnesSelf - Natural History Museum of Los Angeles County Kevin MiddletonSelf - Cal State San Bernardino Henry HollowaySelf - gymnast Richard HulbertSelf - Florida Museum of Natural History Robert G. DundasSelf - Paleontologist Stephen WroeSelf - University of New South Wales Richard Ross导演 / 编剧 / 制片人 Randall M. Boyd剪辑师 / Supervising Producer Kathleen CromleyExecutive Producer: National Geographic Channel Tree WrightCoordinating Producer Anne TarrantSenior Producer Missy GoreAssistant Producer Rebekah MeyerAssistant Producer 
