S4 E1 • Highest Castle, Deepest Grave

A ten year old case is reopened when an archaeological dig unearths the skeletons of two murder victims.

Première diffusion : 14 septembre 1971

S4 E2 • No Bottles... No Cans... No People

Gangster Johnny Oporta arranges for his enemies to be murdered and then covers up his crimes by incinerating their bodies. McGarrett and the others must stop this murderous spree.

Première diffusion : 21 septembre 1971

S4 E3 • Wednesday, Ladies Free

Vic Tanaka is murdering women and painting their faces to resemble a prostitute he once knew, who is now happily married. McGarrett and his team must find the killer before he does any more damage.

Première diffusion : 28 septembre 1971

S4 E4 • 3,000 Crooked Miles To Honolulu

Five-O is up against a sophisticated gang who have come to Hawaii to cash $750,000 of traveller's cheques.

Première diffusion : 5 octobre 1971

S4 E5 • Two Doves And Mr. Heron

A hippie robs an embezzler of the key to a locker containing $250,000. Meanwhile, Danno is trying to contact the daughter of his Berkeley University landlady, who happens to be the hippie's girlfriend...

Première diffusion : 12 octobre 1971

S4 E6 • ...And I Want Some Candy And A Gun That Shoots

Young Vietnam veteran and marksman Billy Shem Jr. buys a rifle under false pretences and proceeds to a bunker at Diamond Head. He then takes pot shots at the people on the road and then the police who arrive. McGarrett must neutralise the threat he poses by any means possible.

Première diffusion : 19 octobre 1971

S4 E7 • Air Cargo -- Dial For Murder

While investigating the death of a security agent at an airport, McGarrett comes into contact with a gang who hijack cargo.

Première diffusion : 26 octobre 1971

S4 E8 • For A Million... Why Not?

Five seemingly good citizens with different motives band together to steal $6,000,000 while McGarrett is away on Maui at a trial.

Première diffusion : 2 novembre 1971

S4 E9 • The Burning Ice

McGarrett finds holes in a convict's story and a husband becomes a suspect in the murder of his wife.

Première diffusion : 9 novembre 1971

S4 E10 • Rest In Peace, Somebody

A policeman who was kicked off the force blames McGarrett and Five-O and plans to kill the Governor.

Première diffusion : 16 novembre 1971

S4 E11 • A Matter Of Mutual Concern

McGarrett must deal with the conflicts between four gangs of differing ethnic background, and try to uncover illegal activities.

Première diffusion : 23 novembre 1971

S4 E12 • Nine, Ten -- You're Dead

A mob boss seeks revenge on a former boxer who smashed the hand of a novice to prevent him from ending up ruining his life in the boxing ring.

Première diffusion : 30 novembre 1971

S4 E13 • Is This Any Way To Run A Paradise?

McGarrett and the team must find out who is behind a series of ecological stunts, when it is feared that a company executive will be their next target.

Première diffusion : 21 décembre 1971

S4 E14 • Odd Man In

A veteran criminal who has already had dealings with Five-O escapes, and plans to steal millions of dollars from drug smugglers.

Première diffusion : 28 décembre 1971

S4 E15 • Bait Once, Bait Twice

A woman attempts suicide in order to get her boyfriend to come out into the open and expose himself to an assassination attempt.

Première diffusion : 4 janvier 1972

S4 E16 • The Ninety-Second War (1)

McGarrett is framed in an elaborate set up by Wo Fat, and has to contend with a foreign double amongst other problems.

Première diffusion : 11 janvier 1972

S4 E17 • The Ninety-Second War (2)

Several faces from the past reappear as McGarrett must stop Wo Fat from carrying out his plan, a ninety second attack on a missile tracking base.

Première diffusion : 18 janvier 1972

S4 E18 • Skinhead

When a young woman is beaten and raped and a soldier is arrested for the crime, McGarrett begins to have doubts about his guilt.

Première diffusion : 25 janvier 1972

S4 E19 • While You're At It, Bring In The Moon

An eccentric billionaire is accused of murdering a business associate, but will not leave his boat to defend himself against the accusations, allowing his associates to declare him mentally incompetent.

Première diffusion : 1 février 1972

S4 E20 • Cloth Of Gold

Three real estate crooks die horrible and mysterious shellfish related deaths, and McGarrett and the others must establish the link between them, and who has reason to want them dead.

Première diffusion : 8 février 1972

S4 E21 • Good Night, Baby - Time To Die!

McGarrett sets up a cordon of police around a young woman to capture her boyfriend who has escaped from jail, but all is not as it seems...

Première diffusion : 15 février 1972

S4 E22 • Didn't We Meet At A Murder?

A young widow becomes part of a blackmail plot involving the murder of a Chicago mobster.

Première diffusion : 22 février 1972

S4 E23 • Follow The White Brick Road

Danno goes undercover onboard a Navy ship to try and uncover how sailors are smuggling heroin onto the islands.

Première diffusion : 29 février 1972

S4 E24 • R&R -- &R

A psychotic man named Ralston is killing the wives of members of his army unit, and Five-O, including Kono on his last case, must stop him before he commits any more crazed attacks.

Première diffusion : 7 mars 1972