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1. Bölüm An Irish terrorist uses disguise and deception in order to be able to smuggle explosives for the Troubles.
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2. Bölüm When a sea-freighter is hijacked, the wealthy millionaire owner calls in Five-O, but all is not how it seems...
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3. Bölüm McGarrett must solve both a mysterious kidnapping and the problem of having a nosy reporter analysing his every move.
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4. Bölüm McGarrett engages in a personal struggle to clear the record of an officer and close friend accused of criminal activity.
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5. Bölüm Five-O must find out whether the death of an archaeologist is linked to his supposed desecration of tomb of King Kamehameha.
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6. Bölüm The return of a disgraced alcoholic policeman causes extra problems in the pursuit of a pair of armoured truck robbers.
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7. Bölüm McGarrett must deal with an astronaut turned real-estate salesman in order to crack the case of a murdered reporter.
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8. Bölüm When a Russian tennis star wants to defect, McGarrett must work to prevent an international incident.
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9. Bölüm A secret submarine, the murder of a Navy officer and strange amnesia create a puzzling case for Steve McGarrett.
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10. Bölüm A gang of university students plan a hoax tidal wave in order to steal priceless jewelry.
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11. Bölüm When an Asian ex-leader dies in a seemingly accidental swimming incident, his wife is convinced that he was murdered by forces from their home country.
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12. Bölüm McGarrett becomes involved in a love triangle between a young local man, a rich girl and her father who hates the Hawaiian origins of the boy.
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13. Bölüm A young doctor is suspected of having been involved in the murder of his mentor.
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14. Bölüm In order to find out the identity of the murderer of a union leader, McGarrett goes undercover as a longshoreman.
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15. Bölüm An up-and-coming young politician is blackmailed in order to affect his leadership of an congressional investigation.
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16. Bölüm While pursuing a drug dealer, McGarrett also has to contend with a federal agent.
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17. Bölüm Danno must deal with a surfer, one of his friends, who is suspected of the murder of a girl.
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18. Bölüm A female undercover cop threatens the progress of an investigation when she starts a relationship with a man connected to the case.
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19. Bölüm A Japanese businessman comes under attack from a young man whose father suffered in an Japanese Prisoner of War camp.
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20. Bölüm McGarrett must deal with an apparent mass murderer when a will creates a fortune for the last family member left alive.
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21. Bölüm A cryogenics institute comes under suspicion when an investigative writer becomes involved.
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22. Bölüm Five-O must deal with the kidnapping of an Arab princess, and Steve must also deal with an Italian female journalist's constant interruptions.
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23. Bölüm Five-O become involved in a complex case of body-switching, mystery investments and suitcases full of money.
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24. Bölüm Five-O's world is shattered when mobsters catch Chin Ho undercover and order him to be killed.