Plot summary
Magnum's tradition of spending the Fourth of July alone at sea turns to a life-and-death battle when his surf ski capsizes due to a reckless boater and a strong current takes him further and further from land. Forced to tread water for hours in shark-infested waters, Thomas uses his memories of his mom and dad to keep himself alive while Higgins, T.C., and Rick begin a frantic search for him.
Credits
Adapted from Wikipedia contributors, List of Magnum, P.I. episodes. HTML formatting and reference markers removed.