Episode list

Wo Fat, disguised as an academic from Hong Kong, organizes the theft of deadly toxins on loan to the University of Hawaii for medical experiments. McGarrett travels to Hong Kong in pursuit of Wo Fat but is captured.

The operator of a Honolulu museum devises a scheme: use the premier Hawaiian parade as the cover for the biggest bank robbery in Hawaiian history. First he kills a history expert who would know he was fudging the details of the recreation of the 1889 Wilcox rebellion. He also recruits criminals who can execute his plan. Once the caper occurs, can McGarrett & Co. rebound to bring the criminals to justice?

The wages of sin are death for prostitutes who are being murdered by a pimp and his totally psycho helper in an effort to get the survivors to join his "stable." The women organize on their own and try to fight back, but are reluctant to go to the police because they could spend a long time in jail. But as the frequency and viciousness of the attacks increase, McGarrett establishes a tenuous pipeline to the women's leader to try to trap the enforcer.

A group of university students and their professor are examining a volcanic crater when they discover the bodies of five men in an inconspicuous location. Doc Bergman is initially unable to determine the cause of their deaths, so he enlists the aid of cantankerous physicist Grant Ormsbee, with whom McGarrett and Five-O are already familiar (from the previous season's "The Defector"). Five-O eventually learns that most of the dead men came from a variety of foreign countries, and that all of them died from exposure to radiation - creating an even bigger mystery for Five-O, because there is no lawful source of radioactive material, nor a facility working with it, in Hawaii that could have led to this exposure.

A plane arrives in Hawaii with 300 passengers aboard, including a tour group of 40. After everyone has left the plane, however, a stewardess discovers that one remaining passenger is dead, the victim of a stabbing with a thin instrument of some kind. Then a woman is discovered dead in a tropical park with a similar wound. Because the victim on the plane turns out to have been a CIA agent, McGarrett contacts Jonathan Kaye in Washington, and learns that the killer may be a mysterious hit man known only as "Raymond." With little information about either the killer or his intended victim, McGarrett assigns officer Sandi Welles (seen in the previous season's "Loose Ends Get Hit") to go undercover as a guide with the tour group from the plane, hoping that she can discover something.

Someone breaks into Five-O's temporary offices at the Territorial Building and, for the most part, manages to avoid the burglar alarms. When the alarm is triggered, the guard who responds is decoyed by a small music-playing souvenir doll long enough for the burglar to escape. The next day, however, Five-O's staff can find nothing missing, even though there is evidence that the lock to one of the cabinets was picked. What was taken they only learn later -- a single sheet official requisition form that is used to steal about $14,000 in state money -- the first step in an elaborate scheme by a check forger whom McGarrett once helped put in jail.

A gang of hijackers sign on as crew members of luxury yachts, then murder the owners and steal the boats to sell in South America. Danno and Sandi Welles go undercover to track them down, but Sandi is taken hostage on one of the boats. The title comes from the particularly sadistic gang leader flipping a coin to decide whether Sandi and the other hostages, whom he's going to throw overboard, will be given a life raft.

A man named Jim Spier breaks out of prison, shortly after refusing to accept parole for the second time. Spier had been convicted of the murder of his wife, but had always claimed to be innocent of the crime. With assistance from a beautician friend of his, Spier changes his appearance and begins to investigate the case against himself anew. McGarrett and Five-O also look into the crime again, even as they search for Spier - and find that upon re-examination, at least some of the evidence against Spier doesn't appear to be that solid.

Two mobsters wage war on each other, with Danny's photographer girlfriend -- who snapped a picture of one of the two sneaking back into the Islands -- caught in the middle.

The top financial aide to Chang Liu, the head of one of the islands' crime syndicates, is ambushed and killed when he tries to return to Hawaii surreptitiously via helicopter. The killers are all members of a street gang that normally wouldn't take on a criminal organization like Chang Liu's, but the gang members have inside information given by someone close to Chang Liu - his daughter. Then Chang Liu and Five-O each try to find the $4 million in laundered money that Chang Liu's aide was bringing with him when he was ambushed.

A sniper targets police officers.

After a young woman has died from a drug overdose, Johnny Kling moves to avenge the death by killing those who sold and distributed the drugs. Kling performs the killings in such a way to evoke scenes from old movies. For his final target, he intends to copy the explosive ending from "White Heat."

McGarrett has been dating a fashion designer named Cathi Ryan. He receives an urgent telephone call from her one afternoon, and arrives at her house to find her apparently having just been killed. Then he is hit on the back of the head, and awakens to find neither the telephone nor his police radio working. He manages to report the crime, but then discovers that there are a number of clues suggesting either that he committed the crime -- or that he has been the victim of an elaborate plot to frame him for murder.

Because the country of Japan has very strong restrictions on handguns, smugglers can turn huge profits by buying or stealing them in Hawaii and seeking them on the Tokyo black market. A Tokyo police officer, who narrowly escaped an assassination attempt on the Tokyo street and picked up the assailant's weapon, traces it to Honolulu. He arrives there and tells McGarrett of his find, and the two of them form a task force to find the leaders of a Hawaiian smuggling ring.

Glenn Cannon's final episode as Attorney General John Manicote gives him a major role as his daughter disappears into a rain forest on the windward side of Oahu, just as a maniacal serial killer breaks the prison van and heads into the same area with a shotgun.

Officer Sandi Welles has a younger brother Mike, of whom she is VERY protective. This is with good reason, as Mike is a chronic gambler fighting a losing battle with addiction and heavily in debt. Mike sneaks into an illegal casino which is then raided by the police. As Mike flees on foot, he is stopped by a police sergeant. A mobster fleeing the scene in his car runs over the police sergeant, who is fatally injured. Mike runs away as McGarrett and his team arrive on the scene. Mike does not want to let Sandi know that he has relapsed into his old gambling habits, so he contacts the mobster and demands hush money to cover his debts. The mobster agrees, but then goes after Mike to silence him.

A retired chemical engineer, after fighting City Hall and the state government over the proposed demolition of his housing complex for the elderly, wears a bomb into a Jimmy Borges concert and demands that the Governor cut through the red tape -- but doesn't count on the psycho girlfriend of a mobster about to be shipped to the mainland crashing the party and taking HIM hostage. This episode features Richard Denning in a larger-than-usual role and is the only acting role for director Sutton Roley, who appears at the beginning as the judge signing the extradition order.

Two inept criminals trying to make some quick money kidnap a famous singer and spirit her off in a boat - but the boat is caught in a violent storm. It wrecks on the north coast of Kauai. The coastline there is known as the Na Pali Cliff region; it is very rugged country with no roads and only a few trails. The kidnappers survive the wreck, they learn that the boat has been reported missing and is presumed destroyed. To avoid losing out on the half-million-dollar ransom, the kidnappers engage the help of a local nature lover. He directs them to a general store where they can make a telephone call to the singer's manager, to demand the ransom payment. Danno is familiar with the area, he has surfed there. He goes to the cliffs area to find out where the kidnappers are hiding. After trekking through the rough terrain, Danno, McGarrett, and Chen confront the kidnappers.

A mainland mobster arrives in the Islands planning to buy a semi-pro football team and skim the profits. When his brother, who has lived in Hawaii for some years, warns him that "they do things differently here," the mobster sneers: "This place is just Cleveland with coconuts!" Big mistake. McGarrett puts surveillance people on the mobster's trail and tells them to make the surveillance so obvious that anyone the mobster tries to threaten can just point to the cops and laugh in the mobster's face (sometimes the trackers do it too). The mobster tries to bribe Chin Ho and winds up with a lovely thank-you letter from the charity Chin donated the check to. And on and on and on, until the mobster brings in a hired gun to go after McGarrett, then gets hold of a weapon and tries to finish the job himself. Finally the mobster, having lapsed into diabetic shock and been admitted to McGarrett's hospital, fakes a fire alarm to get into McGarrett's room and shoots his "body" on the bed -- only to have the lights come on and McGarrett (who was propped up in a closet) tell him that Five-O "made" him with one look at his MedicAlert bracelet.

A year after a Soviet submarine was sunk near Hawaii, pieces of what appear to be key components of the sub's computer begin washing ashore. McGarrett suspects that devices have been planted to sabotage other parts of the sub's computer that were already in the hands of the U.S. government - but cantankerous scientist Grant Ormsbee insists upon going ahead with testing of the components despite McGarett's concerns.

With Five-O on the verge of a major crackdown on illegal gambling, McGarrett is approached by Susie Wainane, an old friend now in college in California. She has returned to Hawaii over concerns that her brother, Billy, who worked as a rider in a Hawaiian rodeo, seems to have disappeared. McGarrett agrees to assist her in investigating Billy's disappearance - and finds that everyone he questions at the rodeo seems oddly reluctant to discuss the Billy's whereabouts.

Sunny Mandell, a teenage runaway, holes up in Honolulu with a man who helped her back in Los Angeles. But the helpful man is a gangster with a grudge against Sunny's father, a Los Angeles cop who sent him to a California prison. The gangster takes Sunny to a hotel where he murders an associate and forces Sunny to take hold of the murder weapon, leaving her fingerprints on it. Sunny's father has meanwhile arrived in Honolulu and consulted with McGarrett about the connection. With the unlikely help of a Peeping Tom who witnessed the murder with his telescope, they clear Sunny of the murder but can't find her - she ditched the killer and went panhandling on the streets, where the leader of a weird cult found her and offered her refuge in the cult's group home while indoctrinating her. It becomes a race against time and a battle of wills as McGarrett, the cult leader and the murderer all compete to get Sunny under his control.

After an attempt to hijack an Army vehicle carrying M-16 vehicles goes awry, an arms dealer and his underlings recognize that the bases and transports with small arms will be more heavily guarded. But then one of his men gets an idea how to get onto an Army base using an unorthodox approach -- when two men slip into the penthouse of a hotel and make off with King Kamehameha's golden feathered cape -- using a hang-glider.