Thu, Jan 5, 1978
Urged on by a powerful businessman, the Governor forces McGarrett to launch a kidnapping investigation when the magnate's daughter disappears in the company of a native "Kanaka" who is her secret boyfriend and -- unknown to everyone -- the father of her unborn child. The search leads to the Big Island, where the boyfriend gets a job as a fisherman and marries the girl.
Thu, Jan 12, 1978
A respected physician on a remote island is found dead, and an autopsy reveals he was blown away with a shotgun while night swimming. The only suspect is a young-Turk doctor at a local clinic, who was convinced the old doctor had botched operations and killed people. But when other people's stories turn up inconsistent, McGarrett realizes the old man was covering for a series of shady financial transactions and was killed -- by someone else -- because he knew too much and was blackmailing somebody to hang onto his job. The killer is not revealed until late in the show; a good fistfight in a horse barn caps this episode.
Thu, Feb 2, 1978
A candidate to head a longshoreman's union is murdered in broad daylight, yet there are few clues about the crime. The dead man's opponent, who has political connections to the Governor, is pressing for McGarett's office to move quickly on the investigation. With few leads, McGarrett decides to locate the girlfriend of the murdered candidate, whom he believes has vital information about the crime, by impersonating a longshoreman himself - without telling Danny Williams, Chin Ho, or the other members of the Five-O unit.
Thu, Feb 9, 1978
John Richard Carr, a rising member of the House of Representatives, is visiting Hawaii to judge a beauty pageant. He has a tryst with one of the contestants, who drugs him so that Carr can be filmed in her company, in order to blackmail Carr into ending his bribery investigation of a prominent Malaysian. But the woman who helps the blackmailer drug Congressman Carr is herself murdered by the blackmailer's henchmen - so that Congressman Carr is not just implicated in an infidelity scandal, but becomes a murder suspect.
Thu, Feb 16, 1978
An undercover cop from McGarrett's office is murdered during a drug buy. Five-0 quickly learns the identity of the killer; they prepare to arrest him. But an FBI agent intervenes, he tells McGarrett to stand down. The shooter is in the protected witness program, and the Justice Department is using the man to go after an organized crime ring. McGarrett objects, but he is forced to work with the FBI agent. The Syndicate sends a hit man to go after the protected witness, and anyone else who gets in the way.
Thu, Mar 16, 1978
The answer to the title question is never for a fanatic who recently lost his best friend, a man determined to track down the commander of a brutal Philippine prison camp in World War II. The former commander is now a well-respected Hawaiian manufacturer, so the young punk -- with surprising help from an unexpected source -- begins setting off WWII ordinance explosives at the manufacturer's plants, killing one and injuring several. McGarrett must find the bomber before he exacts elaborate eye-for-eye "justice" with a bayonet.
Thu, Mar 23, 1978
Someone is playing a deadly game of 10 Little Indians with the heirs to a wealthy, now-dead artist, who left his fortune to anyone who could survive him by one year. Not only was the artist murdered by a lethal overdose in a medication he took, the heirs one by one are falling victim to booby traps set in their most prized possessions.
Thu, Mar 30, 1978
A mystery writer goes to investigate a cryogenics foundation which purports to freeze dead people and revive them when a cure can be found for their diseases. But the writer soon figures out that the frozen victims never really wake up (a "Revival" is staged by an employee), and the foundation is actually getting them to sign over their assets, and killing them.
Thu, Apr 27, 1978
A dead body is found in a sugarcane field, which turns out to be that of Frank Kealoha, owner of a large nearby ranch. When informed of her husband's death, Kealoha's widow asserts that she knew he was dead - she had buried him several months before. As the title suggests, however, there is a stranger's body in Kealoha's grave, leading McGarrett and Five-O onto the trail of a missing federal agent, and into an investigation of money laundering and murder.
Thu, May 4, 1978
Chin goes undercover to investigate a protection racket. But when he's recognized, the leader kills him and dumps his body at the Iolani Palace. Steve sets out to get the one who killed him. He brings in the head of the organization behind the protection racket and asks for his help. He refuses. Chin's daughter arrives and Steve tells her what happened. It turns out that she knows the daughter of the head of the organization and uses her relationship with her to see if she can find out who killed her father.
Thu, Sep 28, 1978
The body of a murdered federal agent is found, and Five-O is contacted by the government agency that sent him to Hawaii, which also sends another agent, Glen Fallon, to Hawaii to assist Five-O. McGarrett and Five-O discover that the murdered man was investigating the possibility of a "sleeper" agent within the March Foundation, a think-tank funded by the U.S. government. The evidence uncovered by McGarrett and Fallon begins to suggest that the Foundation's chief, Dr. Rathman, is the "sleeper" that the murdered agent was looking for.
Thu, Oct 5, 1978
Four stabbings have taken place in Honolulu, but Five-O hasn't been able to come up with anything linking the victims, or any consistent pattern among the killings except the murder weapon used. Then McGarrett is unexpectedly visited by Agnes DuBois, a young Englishwoman whose profession is preparing horoscopes. She claims that all of the victims shared certain astrological characteristics. Though McGarrett and the other members of Five-O are initially skeptical, they become intrigued when she correctly predicts the time and place of a fifth murder.
Thu, Oct 19, 1978
Once a juror, always a cop ... McGarrett, serving on a murder-trial jury, is the only holdout for acquittal when the scenario for the "locked-room" killing, which points to the electronics-expert defendant, doesn't match any physical evidence, so he contacts Five-O and asks them to reopen the case.
Thu, Nov 16, 1978
The King Tutankhamun artifacts are on display in Honolulu, thanks to the efforts of art patron Alicia Warren. While the exhibit is open, however, a man rushes in and smashes a display case, stealing Tutankhamun's gold death mask. McGarrett quickly recovers the item, but then discovers that the recovered mask is a forgery that has been switched for the real mask. McGarrett determines that there are several suspects in the theft, including the curator of the museum where the exhibits were displayed - and Alicia Warren herself.
Thu, Nov 23, 1978
A small-time Chinese criminal in prison has big ties to the Chinatown mob, which is gearing up for a fight with a rival gang. McGarrett promises the young man a pardon in exchange for his help in thwarting the mob war, and then carries out an elaborate escape and phony assassination attempt to convince the gangsters that their buddy is still on the wrong side of the law.
Thu, Dec 14, 1978
A member of the Canadian Parliament is killed in a hit-and-run accident in a remote area, and Five-O discovers that he was apparently on Oahu to meet the one person whom he knew there, a stewardess named Linda Forbes. McGarrett's initial attempt to question Linda is rebuffed by her uptight sister, Diana, though he eventually meets with Linda and finds that she is virtually the exact opposite of her sister. But as the evidence mounts that Linda had something to do with the hit-and-run death, McGarrett is forced to examine what he increasingly finds is the odd relationship between the two sisters.
Thu, Dec 21, 1978
A distraught man comes on stage during a live TV broadcast by a charismatic preacher and shoves an unloaded gun in his face, demanding the preacher account for the death of the assailant's wife, who was a member of his congregation. When Five-O investigates, they find the charges may be well-founded and the preacher may be heading a cult of brainwashed people to get at their assets.
Thu, Dec 28, 1978
The Hawaiian "kumu" mob, first introduced in "A Death in the Family" (episode #10.24) returns with a new boss named Tony Alika (Ross Martin), and their first order of business is to kill the head of the Hawaiian music mafia and muscle in on a promising new singer, played by real-life singing star Yvonne Elliman.