6x01 Hookman
September 11, 1973 8:00 pm
A amputee with no hands sets out to kill every police officer who contributed to his injury, and that includes Steve McGarrett.
6x02 Draw Me A Killer
September 18, 1973 8:00 pm
Murders are being committed seemingly at random every six weeks, and McGarrett is at a loss to understand the motives for these crimes. However, a newspaper may hold the answer.
6x03 Charter For Death
September 25, 1973 8:00 pm
When a large amount of diseased rats are found on a boat with all the crew dead, Five-O must contend with an outbreak of bubonic plague.
6x04 One Big Happy Family
October 2, 1973 8:00 pm
A family of white-trash mass killers arrive on Hawaii after wreaking a trail of devastation on the mainland, and McGarrett must catch them before they can do more damage on the islands.
6x05 The Sunday Torch
October 9, 1973 8:00 pm
Buildings are being set on fire on Sundays, and a known firebug is the top suspect. However, McGarrett begins to think that others may be responsible.
6x06 Murder Is A Taxing Affair
October 16, 1973 8:00 pm
A corrupt federal agent who is tracking a man under indictment for tax evasion kills him for the $600,000 he is carrying, and then loses the money.
6x07 Tricks Are Not Treats
October 23, 1973 8:00 pm
The killing of an important pimp threatens an all out war between two competing vice empires.
6x08 Why Wait Till Uncle Kevin Dies?
October 30, 1973 8:00 pm
A string of five murders of wealthy men leads McGarrett to a crooked inheritance scheme.
6x09 Flash Of Color, Flash Of Death
November 6, 1973 8:00 pm
A glamorous woman sets up an opal smuggler so her accomplices can rob both the smuggler and a jewellery store at the same time.
6x10 A Bullet For El Diablo
November 13, 1973 8:00 pm
A dictator must evade a female assassin sent to kill him, one that looks just like his own daughter.
6x11 The Finishing Touch
November 20, 1973 8:00 pm
McGarrett brings in a document expert to help him crack a case involving forged government securities, but he soon becomes suspicious of the expert as well…
6x12 Anybody Can Build A Bomb
November 27, 1973 8:00 pm
A nuclear scientist becomes involved in an extortion plot when a gang threaten to explode a small nuclear weapon somewhere in Honolulu.
6x13 Try To Die On Time
December 4, 1973 8:00 pm
Harry Foxton, a gambler, is himself the subject of huge bets over what hour he will die. McGarrett must work out the gambler's complex relationships to get to the bottom of this case.
6x14 The $100,000 Nickel
December 11, 1973 8:00 pm
A thief known for using sleight-of-hand is hired to steal a valuable nickel, but the coin ends up on a journey across many miles and through many hands.
6x15 The Flip Side Is Death
December 18, 1973 8:00 pm
A mock military emergency leaves a bank open for a robbery, and Five-O must travel to the opposite side of Oahu to find out more in their investigation.
6x16 The Banzai Pipeline
January 1, 1974 8:00 pm
An exciting surf beach is the location for a filming session, where a man catches a killer on camera.
6x17 One Born Every Minute
January 8, 1974 8:00 pm
A pair of crooks team up with local criminals and use phony diamonds as bait to prey on wealthy male tourists. McGarrett and Five-O must shut off this sinister racket.
6x18 Secret Witness
January 15, 1974 8:00 pm
A young man witnesses a murder, and finds himself and his family are now the killer's targets.
6x19 Death With Father
January 22, 1974 8:00 pm
The son of a Federal Narcotics officer becomes involved in a heroin refining operation.
6x20 Murder With A Golden Touch
January 29, 1974 8:00 pm
When a man is found dead with gold dust on him, McGarrett and his team must investigate where the stolen gold came from and how it is being bought onto the market.
6x21 Nightmare In Blue
February 5, 1974 8:00 pm
A series of rapes and murders occur, and the main suspect seems to be a police officer...
6x22 Mother's Deadly Helper
February 12, 1974 8:00 pm
A right-wing crackpot, Cord McKenzie, metes out ‘justice' to people who have been found innocent on technicalities or released early. He thinks he is helping the police, but McGarrett thinks otherwise.
6x23 Killer At Sea
February 19, 1974 8:00 pm
While investigating a robbery and kidnapping, the trail of clues leads McGarrett and the team to an ocean liner with a deadly passenger.
6x24 30,000 Rooms And I Have The Key
February 26, 1974 8:00 pm
An aging jewel thief steals from rooms at Waikiki hotels, and taunts Five-O by leaving a trail of clues behind.
