When Wo Fat steals toxins in an attempt to take out the leaders of Communist China, McGarrett must track him to Hong Kong.

McGarrett must solve a daring bank robbery committed during the King Kamehameha Day Parade under the cover of a historic re-enactment.

The murder of island prostitutes seems to be linked to an extortion racketeer who is determined to make a return...

Five bodies are found in the crater of Mauna Loa contaminated by radiation from illegal plutonium, and Five-O must find and confiscate this deadly toxin.

Two seemingly unconnected deaths lead McGarrett into a desperate race to prevent the assassination of a visiting Sheikh.

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

When yacht racers are found dead on their craft, Five-O launches a desperate search for high-seas buccaneers.

A escaped convict may well have a strong case of innocence, when Five-O become involved in the paranormal...

A press photographer is pursued relentlessly after she takes a photo of a supposedly dead gangster who has returned to the islands to take control of the local syndicate.

When $10 million goes missing from a crimelord, the culprit seems to be dangerously close to home...

Police are being lured into traps and shot, and Five-O have difficulty nailing a suspect when their primary lead turns out to be a paraplegic.

The boyfriend of an overdose victim re-enacts famous film murders in a revenge on all the people he sees as responsible.

McGarrett is the top suspect in the murder of his girlfriend, and the evidence against him is seemingly overwhelming...

Five-O must work with a Japanese officer to find the source of handsguns that are flooding the black market in Tokyo.

The daughter of Attorney General John Manicote is kidnapped by a deranged rapist and murderer, and Steve must not only contend with the criminal but Manicote's emotional state as well...

A hit and run incident leads Five-O to a gambling syndicate and Officer Welles's brother.

A pensioner threatens to blow himself and his hostages up if he doesn't stop the demolition of his home.

A lady singer is kidnapped and it looks as if she and her captors have died at sea.

A gangster attempts to buy an interest in a football club so that he can launder money through it.

While searching for parts from a sunken Soviet submarine, McGarrett become suspicious about the particular parts that are being recovered.

A missing rodeo cowboy and the murder of a young couple pose a puzzling mystery for Five-O.

The daughter of a LA detective and friend of McGarrett is framed for murder and then joins a cult.

A gang of thieves steal army rifles by peculiar means - hang-gliding into the armoury!