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Dangerous Seas

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.

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  • Originally Aired September 9, 2003
  • Runtime 29 minutes
  • Content Rating United States of America TV-G
  • Network BBC Four
  • Created January 12, 2019 by
    Administrator admin
  • Modified December 9, 2021 by
    Cooper19
Name Type Role
Jasper James Writer
Nigel Marven Guest Star
Michael Davis Guest Star
Karen Hayley Guest Star
Jasper James Director