McGarrett investigates the death of a friend when it becomes apparent that the man did not drown as was commonly believed.

McGarrett's investigation of an old friend's drowning points to a foreign ship moored in a Hawaiian harbour.

The Hawaiian governor assigns McGarrett to break a ring of con artists swindling visiting rich widows.

An official's death involves strange clues, including a woman with a camera and a man with a briefcase.

A publicity stunt by a young rock singer to stage his own kidnapping backfires when ransom is offered.

McGarrett must protect an underworld kingpin that he is trying to convict of racketeering activities.