Season 12
Episodes
1. A Lion In The Streets (1)
McGarrett finds himself stymied when Hawaiian nationalists and local underworld mobsters clash over a union election.
2. A Lion In The Streets (2)
Labouring under a ban on cooperation by native Hawaiians because of a Kahuna, McGarrett must try to prevent war on the streets...
3. Who Says Cops Don't Cry
When the husband of a policewoman is gunned down by opportunist robbers, she resolves to catch them any way she can.
4. Though The Heavens Fall
A group of high society men set out to see that justice is done - the catch being that it is justice on their terms only...
5. Sign Of The Ram
Jessica Humboldt, an astrologer and friend of Agnes DuBois, comes to McGarrett with news that a forthcoming match will be disastrous for a boxer. McGarrett must overcome his suspicions and crack the case.
6. Good Help Is Hard To Find
Tony Alika and Guido Marioni, killer of Kimo's family, together hatch a plot to frame and embarrass the Five-O team by making them look stupid or corrupt.
7. Image Of Fear
When a woman is stalked by a strange figure, she seems to be seeing things and her friends are worried as to her mental health. However, events prove her case and an accomplice is revealed...
8. Use A Gun, Go To Hell
When two surfer bums use a gun to rob a shop, it starts off a trail of death and misery involving children, politics and blackmail.
9. Voice Of Terror
A group of terrorists capture a female officer and use her to further their aims, and McGarrett and the team must find a way to take them out without endangering the life of Officer Dean.
10. A Shallow Grave
A young man on vacation has strange visions that lead him to the site of an old murder and help him discover a lost family.
11. The Kahuna
When two healthy young people die mysteriously, local traditions prevent post mortems, and a strange conspiracy is gradually uncovered when Truck seems to fall under the power of a Kahuna...
12. Labyrinth
When a rich socialite is kidnapped, her husband insists that Five-O stay out of the case. However, his reasons may not all be on the level as events take a series of twists and turns...
13. School For Assassins
McGarrett and Kimo must stop a gang of trained assassins from disrupting a meeting of energy ministers.
14. For Old Times Sake
A aging crook decides to use dollar bill printing plates he made to raise cash for a charity, but he fails to realise the trouble that this will cause.
15. The Golden Noose
McGarrett is suspicious of an aide who arrives in Hawaii to retrieve millions of dollars held in trust for a Southern Asian state and he must prevent a daring gold robbery.
16. The Flight Of The Jewels
A gang of clever students use radio-controlled planes to execute the theft of Queen Liliokalani's jewels.
17. Clash Of Shadows
The murder of a Nazi-hunter and discovery of a World War II medal set McGarrett and the team on the trail of a Nazi war criminal living in Honolulu...
18. A Bird In Hand...
A group of seemingly harmless birdwatchers are the target of a vendetta. Five-O must discover why they were a target and stop any further violence.
19. The Moroville Covenant
A politician trying for the Senate is weakened by the murder of the man who is blackmailing him.
20. Woe To Wo Fat
The series concludes with the final showdown between McGarrett and Wo Fat. Three scientists have gone missing. They have one thing in common: they all attended a symposium that discussed a possible space-based, laser defense system. McGarrett impersonates a fourth scientist, Dr. Elton Raintree, who attended the same gathering and is soon abducted. Wo Fat is behind it all and wants the scientists to complete their work and produce such a device.