Докато МакГарет е в затвора в очакване на присъда за убийството на губернатора, Дани води изненадващ посетител, който да го оневини. През това време Коно е отстранена от екипа и предстои вътрешно разследване.

Губернатор Денинг назначава Лори Уестън в отряда, за да е сигурен, че МакГарет и екипът му ще следват новите правила. В това време, екипът разследва отвличането на шампион по гребане, докато Винс Фрайър продължава разпита с Коно.

За да може да се започне разследване за убийство, МакГарет убеждава Макс да направи нова аутопсия на морски пехотинец, който се е самоубил. Чин Хо се тревожи, че Коно се движи с Франк Делано и група корумпирани бивши полицаи.

Екипът започва разследване в красивите води на Хавай, за да разкрият убийството на гмуркач, известен в намирането на ценни изхвърлени товари.

Разследването на убийството на треньор по женски волейбол води до още лоши новини за Коно, докато Чин Хо отново се сближава с бившата си годеница Малиа.

Убийството на заможен ресторантьор кара МакГарет да се включи в благотворителен мач по смесени бойни изкуства. През това време, агент Кенси Блай дава експертизата си на МакГарет и командир Уайт за видео от бащата на МакГарет.

When the Five-0s investigate the murder of a young couple filming a spooky documentary about a traditional Hawaiian burial site, they are threatened by a drifter who puts a curse on Danny.

When the Five-0 discover a John Doe in the trunk of a stolen car, they not only have to find a killer, but also need to figure out who the physically-altered victim was. Meanwhile, a homeless Danno is sleeping on McGarrett’s couch.

McGarrett finds himself in need of the Five-0’s help when he goes to North Korea with Jenna Kaye to deliver a ransom to rebels who are holding her fiancé hostage. Meanwhile, the Five-0 investigate the murder of an investigative reporter who seems to have ties to Jenna.

McGarrett and the Five-0 search for a busload of kidnapped school children as well as the people responsible.

On the eve of Chin Ho’s wedding to Malia, the Five-0’s investigation into a man left for dead in an abandoned WWII bunker crosses paths with Capt. Fryer’s case of a Jane Doe.

When the Five-0 team discover that the murder of a High School girl was a professional hit, they must find out why she was targeted before they can find her killer.

Chin Ho shares news about Joe White that rocks McGarrett to his core; Danny is forced to play midwife when his ex goes into early labor.

When Danno and his family are targeted by a vengeful dirty cop from Danno's past, the team steps in to help.

When the team almost causes an international incident, Lt. Gov. Denning decides that one of them should be fired; Chin Ho faces the harrowing task of choosing a Valentine's Day gift for Malia.

Five-0 investigates the murder of a man dressed as a Hawaiian NaKoa warrior found in the jungle near the site of a historical war reenactment

Five-0 crosses paths with Tony Archer, a retired NYPD bomb expert who is now a private investigator on Oahu, when they investigate the death of famous talk radio DJ Bobby Raines.

When McGarrett's sister is arrested for smuggling diamonds, he enlists the help of an ex-con to set up a sting.

A murder case hits close to home for Max when he is convinced that The Trashman, a serial killer with ties to his past, is on the loose. In order to convince Five-0 of his suspicions, Max reveals shocking information about his childhood.

Five-0 and the NCIS: Los Angeles task force team up in Hawaii when there’s a suspect on the loose who is threatening to release a deadly virus into the population.

The crossover continues on NCIS: Los Angeles S03E21 Touch of Death (II).

Just as McGarrett finally gets his hands on his arch nemesis Wo Fat in a special ops raid, he’s blindsided when he finds that the Japanese Yakuza is hot on their trail and wants them both dead.

Five-0 is in hot pursuit of a shooter who guns down one of their own, while another team member is forced to choose which of their kidnapped loved ones will live.