22 episodesFirst aired 27 September 1978
E1Sept 19781h
After a government agent is murdered, McGarrett must identify the traitor in a scientific facility.
E2Oct 19781h
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.
E3Oct 19781h
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.
E4Oct 19781h
McGarrett is the lone hold-out in a trial where the guilt of the accused seems certain.
E5Oct 19781h
Steve is framed on the orders of a gambling syndicate, and becomes involved with a woman who is part of the case.
E6Nov 19781h
Five-O must deal with the plans of a Neo Nazi organisation to kill Bobby Tamara, the ""Hawaiian Kennedy"".
E7Nov 19781h
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.
E8Nov 19781h
McGarrett assists a convict in his escape, so that he can go back to his gang and provide Five-O with inside information.
E9Nov 19781h
Danno is surprised when he bumps into a former flame and even more concerned when she seems to be involved in criminal activities.
E10Dec 19781h
The death of a prominent politician reveals a strange love triangle.
E11Dec 19781h
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.
E12Dec 19781h
Two rival mobs attempt to take control of the disco scene in Honolulu.
E13Jan 19791h
The rival gangs are on the brink of all out war, and Five-O must struggle to stop them.
E14Jan 19791h
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...
E15Jan 19791h
Millicent Shand returns and claims that her niece's husband has faked his own death in order to get his hands on $500,000.
E16Feb 19791h
A vacationing heiress seems unconcerned when McGarrett warns her that someone is after her ruby.
E17Feb 19791h
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.
E18Mar 19791h
A private detective is rescuing girls from prostitution, and using the opportunity to kill the pimps as well.
E19Mar 19791h
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.
E20Mar 19791h
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.
E21Apr 19791h
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.
E22Apr 19791h
Five-O must close the heroin smuggling operation to exonerate the Governor and catch the figures behind the scheme.
