Magnum, P.I. - Season 5 Episode 5 Under World

As he's about to take off after delivering a pair of newlyweds to Maui, T.C. is offered a lot of money to deliver a briefcase to Oahu. On his approach to the Island Hoppers headquarters, he loses control of his helicopter and crashes into the ocean. After being rescued by fishermen, T.C. is rushed to the hospital, where he remains in a coma with his brother Gerald at his side. When the Coast Guard is in no rush to investigate what they consider to be a simple accident, Thomas and Gerald investigate the chopper's wreckage and discover that it was shot down. Thomas, Higgins, Rick and Gerald put their own lives in jeopardy as they set out to find who's responsible for T.C.'s near-fatal crash.