A native's love of his unspoiled homeland, a mysterious woman with a camera, a man with a briefcase, and a millionaire industrialist are pieces of the strange puzzle confronting McGarrett

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McGarrett and his squad must protect a crime boss, facing prosecution, from a society of Japenese assassins

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McGarett must prove his second-in-command, Danno, is innocent of shooting an unarmed teenage supsect

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McGarrett lands a big case when he discovers a fishing boat owner is smuggling gold bars into Hawaii

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McGarrett must make sure his key witness, a mobster's associate, lives to testify against the crime kingpin

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A female student at the Pacific Culutral Institute is strangled and all the evidence points to her boyfriend until a little girl's "fish story" leads the investigation in another direction

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McGarett must devise a battle plan to rescue a shot Danno from a derganed soilders commandeered hospital room

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Danno poses as a surfer to infiltrate a professor-turned-gurus's circle, who may me dispensing more than just notions of peace and love to his followers

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The Five-0 team races against time to track down the source of a bubonic plague outbreak which is threatening the Islands

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After an aging baroness disappears, her two nephews become key suspects in a surprise-filled case that pits McGarrett against a serial killer

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McGarett rushes to find a young prize fighter's killer, before the deceased boxers father, a Maui policeman, exacts his own brand of justice

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McGarrett flies to Los Angeles to investigate a quack doctor he suspects is victimizing his sister and her cancer sticken infant

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McGarrett wages a one-man battle to collect evidence that will prove to his sister- and the local authorities - that the doctor who treated his nephew is a fraud

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McGarrett's attmept to prove he's an officer-of-the-peace, after a protester is shot during an anti-war demonstration, is met with resistance from the slain man's pacifist associates

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After the brides of three G.I.s killed in Vietnam turn up dead, Steve McGarrett uncovers an insurance scam run by a soldier with a murderous grudge

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The Five-0 team racess against time to find a ticking time bomb hidden by a Japanese mental patient determinded to carry out the mission he was assigned 28 years earlier

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Fear spreads through Hawaii after rumors of an imminent tidal wave, but McGarrett discovers the true threat; villainous Red Chinese agent Wo Fat

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After a band of foreign revolutinaries steal weapons from an armory, McGarrett mobilizes the Five-0 force to bring down the terrorists

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A psychology professor and disciple of Wo Fat is using the power of hypnosis to turn citizens into assassins

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When Hawaii’s sugar industry is threatened by a terrorist who plans to use germ warfare, the Five-0 team springs into action to stop the sabotage

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After the robe of King Kamehameha, one of Hawaii’s most treasured symbols, is stolen, McGarrett traces the theft to a group of anti-establishment university students

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To nail a local gangster for a murder, Steve must travel to Singapore to transport the witness to the crime – an alluring woman who is tired of running from her past

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Enlisted to investigate an ex-racketeer suspected of heading a local crime syndicate, McGarrett follows a hunch that the politician seeking to indict the accused man is involved in some dirty dealings of his own

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When the plane carrying a despised dictator is forced to make an emergency landing in Hawaii, the notorious leader is marked for death…and it’s up to the Five-0 team to protect him

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After a kidnapped boy escapes his captors, the boy’s father enlists the Five-0 squad to recover his ransom money from the extortionists

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The stakes are murderously high when a beach boy and a playboy vie for the attentions of a seductive heiress in a bizarre card game

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After an adversary from McGarrett’s past robs a bank under the noses of the Five-0 team, McGarrett follows a trail from Hawaii to Hong Kong to nail the brilliant thief

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Christopher Walken guest stars in this tense episode about an AWOL sailor accused of shooting a Navy shore patrolman

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A Vietnam vet is revealed to be behind the kidnappings of several local children

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After a crooked card game leads to the murder of a young honeymooner, the victim’s brother sets out to find the man responsible

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Martin Sheen is featured in this episode that centers around Chin Ho Kelly, one of McGarrett’s most trusted investigators

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Tom Skerritt (who later starred as the sheriff on TV’s Picket Fences) appears as a cop whose wife has been murdered

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Steve encounters resistance from federal agents when he attempts to uncover the mystery behind a research scientist’s sudden disappearance from his important government post

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In the first part of this captivating two-part episode, the disappearance of a scientific genius, Dr. Alexander Kline, sends shock-waves through the islands

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McGarrett and his team rush to find a test tube containing the deadly “Q strain” which Dr. Kline has hidden and, if not found within 12 hours, will devastate Hawaii

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