As an outbreak of leprosy engulfs 19th-century colonial Hawai'i, a small group of infected Native Hawaiians resist government-mandated exile, taking a courageous stand against the provisional government. Inspired by real-life events.
Five-0 investigates the murder of a man whose body may hold the key to a 20-year-old case involving a kidnapped girl whose father never stopped looking for her.
While Adam investigates the murder of an undercover FBI agent about to wed the daughter of a Yakuza leader, Noelani is held hostage and forced, along with her mentor Dr. Chu (Page Leong), to operate at gunpoint on a criminal.
McGarrett helps his sister spy on shady neighbors; a ride-share driver and his passenger are murdered; the team teases the youngest members when Junior escorts Tani to a wedding.
Fugitive hacker Aaron Wright (Joey Lawrence) resurfaces to ask Five-0 for help when his co-workers at the NSA, which he has been working for, are all murdered. Also, Junior speaks at the parole hearing of the drunk driver who killed his sister.
Five-0 continues to hunt down escape criminal Aaron Wright before he can sell cyber-weapons to the highest bidder; the lives of McGarrett and the team members are put in danger when a visitor comes to headquarters to make amends.
An incorrigible pickpocket asks Magnum for help when a cell phone he recently lifted receives a very suspicious text message; When Rick decides to make a bold career move, TC comes to the rescue.
As MacGyver works quickly to rescue survivors from a collapsed building in Germany, he discovers a new safety threat - an undetonated bomb from World War II hidden beneath the rubble.
Tani and Junior must plot an escape for themselves and several civilians after they become trapped inside a deadly tunnel collapse; Eddie the dog sniffs out a bomb that has been planted in McGarrett's home.
In an attempt to find the main players in the Codex and cut off their match-fixing funding, Desi goes undercover to infiltrate a soccer team and find the corrupt player working with the shadow organization.
Kumu and Higgins are in danger when Robin's Nest is under siege by mercenaries storming the estate in order to find out the true identity of the White Knight, Robin's muse and literary hero.
When Katsumoto suspects that one of his fellow cops is dirty and has stolen evidence, he begrudgingly asks Magnum and Higgins for help; Rick and TC help Los Angeles Rams defensive Aaron Donald recover his stolen tablet.
On Halloween, Magnum and Jin search for a skip-tracer at a Halloween bash, just as Katsumoto tracks an escaped killer who is headed to that same party.
While Magnum temporarily works as the head of a hotel's security, he investigates the death of a guest who was thrown from her room's balcony while working on a secret investigation of her own.
Magnum and Higgins' new partnership is tested when they disagree about being hired by a woman who wants them to recover her $3 million in stolen drug money in order to save her husband's life.
When Russ's former love, Emilia, is kidnapped by the same rebels he fought during the military contract days, he takes the Phoenix team to a small, impoverished town to rescue her and rid the town of the rebels for good.
A plane that mysteriously crashed into the Pacific in the '80s is found, but with a recently murdered scuba diver inside; McGarrett and Quinn zero in on who planted the bomb in his garage; McGarrett formally asks Quinn to join the team.
