Rick (Larry Manetti) sets sail on a chartered fishing excursion with several suspicious-looking customers. Hours later, Rick's boat drifts back to the dock with no one on board. The authorities are certain that Rick and his passengers have been lost at sea, but Magnum suspects otherwise. Assisting our hero in his subsequent investigation is Det. Gordon Katsumoto (Clyde Kusatsu), a John Wayne devotee who insists upon speaking and behaving just like "The Duke" (the fact that the detective's Wayne imitation is pretty awful only adds to the enjoyment of this episode!). ~ Hal Erickson, All Movie Guide