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1. Bölüm After a government agent is murdered, McGarrett must identify the traitor in a scientific facility.
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2. Bölüm When an astrologer visits McGarrett to inform him of a murderer with a terrible temper, his antagonism lessens when her assumptions seem to be partly true.
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3. Bölüm An assassin who doesn't know he's an assassin? Sounds like a punch line from "The Naked Gun," but it's the story of this episode, where a diplomatic courier with a briefcase chained to his wrist is hypnotized and programmed to rig the case with a bomb. When Danno goes undercover to ferret out the assassination ring, he himself is brainwashed and programmed to kill McGarrett.
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4. Bölüm McGarrett is the lone hold-out in a trial where the guilt of the accused seems certain.
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5. Bölüm Steve is framed on the orders of a gambling syndicate, and becomes involved with a woman who is part of the case.
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6. Bölüm Five-O must deal with the plans of a Neo Nazi organisation to kill Bobby Tamara, the ""Hawaiian Kennedy"".
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7. Bölüm When a street robber claims that he stole King Tutankhamun's mask for fun, McGarrett suspects there is more to the case than simple robbery.
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8. Bölüm McGarrett assists a convict in his escape, so that he can go back to his gang and provide Five-O with inside information.
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9. Bölüm Danno is surprised when he bumps into a former flame and even more concerned when she seems to be involved in criminal activities.
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10. Bölüm The death of a prominent politician reveals a strange love triangle.
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11. Bölüm When a preacher is attacked by a man convinced that he is responsible for his wife's death, Five-O investigate more closely and discover some less than godly motives.
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12. Bölüm Two rival mobs attempt to take control of the disco scene in Honolulu.
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13. Bölüm The rival gangs are on the brink of all out war, and Five-O must struggle to stop them.
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14. Bölüm When a robbed bank vault shows no signs of break-in, an inside job seems the likely solution. McGarrett's trail of clues leads him back to the builder of the vault and his wife...
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15. Bölüm Millicent Shand returns and claims that her niece's husband has faked his own death in order to get his hands on $500,000.
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16. Bölüm A vacationing heiress seems unconcerned when McGarrett warns her that someone is after her ruby.
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17. Bölüm When a photographer takes a picture of a politician making a deal with an underworld figure, he tries blackmail. However, he is not prepared for the ruthless nature of the mobsters.
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18. Bölüm A private detective is rescuing girls from prostitution, and using the opportunity to kill the pimps as well.
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19. Bölüm When the son of one of Steve's friends dies of an overdose, he goes after a doctor that he suspects of over-prescribing drugs.
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20. Bölüm The hunt for a high-rise killer is made more difficult for Five-O when a journalist offers to share his profits in exchange for the killer's story.
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21. Bölüm When a woman dies due to heroin packets bursting inside her and the Governor is implicated, McGarrett and Danno head off to Singapore to discover a smuggling operation.
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22. Bölüm Five-O must close the heroin smuggling operation to exonerate the Governor and catch the figures behind the scheme.