When a young boy is arrested as a witness to a murder, McGarrett must contend with a fiery deputy public prosecutor.

When a letter bomb kills a Naval Officer whilst McGarrett is on Navy Duty, he is called upon to investigate and uncovers a plot involving an old nemesis...

McGarrett must try his utmost to foil Wo Fat's plans which include hostages and brainwashing.

Criminals threaten to use a special type of moth to wipe out the sugar cane on Hawaii and destroy the industry.

A masterful forger plans a massive robbery of Navy funds, and McGarrett is made to look rather inept...