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Nigel travels back in time to the seventh deadliest sea of all time, the Ordovician period (450 million years ago), where he is attacked by sea scorpions and comes face-to-face with a giant orthocone. He then explores the sixth deadliest sea, the Triassic (230 million years ago), where he encounters a pair of Nothosaurus, the bizarre sea reptile Tanystropheus and the giant primitive predatory ichthyosaur Cymbospondylus, which Nigel keeps at bay through using a cattle prod. Nigel then dives in the fifth deadliest sea, the Devonian (360 million years ago). In the Devonian, Nigel encounters the strange primitive shark Stethacanthus and the placoderm Bothriolepis and he uses a rounded shark cage to protect himself from the giant predatory placoderm Dunkleosteus.
Ngày phát sóng đầu tiên : Sep 09, 2003
Ngày phát sóng cuối cùng : Sep 23, 2003
Tập phim : 3 Tập phim
Mùa : 1 Mùa
Thời gian chạy: 29:14 phút
Studio: BBC One
Quốc gia: United Kingdom
Diễn viên: Nigel Marven
