Hell on High Seas chronicles some of the most remarkable stories of survival and daring the world's oceans have ever hosted. Amazing feats of courage: some verging on madness, others where death is eluded through sheer bravery, determination and innovation - or even divine intervention? Maurice and Maralyn Bailey spent 117 days adrift in a rubber dinghy in the Pacific after their yacht was sunk by a whale. Five Mexican fishermen went to sea for a three-day shark-fishing trip and vanished - nine months later three of them reappeared. Ben and Elinore Carlin endured a hurricane-lashed crossing of the Atlantic in their tiny amphibious jeep, Half-Safe, the start of an incredible 10-year, around-the-world odyssey.