Five-0 must determine who killed a member of a local company that is bringing sharks in closer to shore. Steve assists Kamekona in getting his helicopter license and this becomes a hot topic of discussion.moreless
Amember of a local roller derby teamfalls toher death in front ofDog the Bounty Hunter, as hewas arresting a fugitive just a few feet away. Catherine is sent in undercover as a new member of the derby team. Steve finds out that Catherine kept a secret from him involving his mother and questions whether he can trust her.moreless
During the pro-bowl weekend in Hawaii, the team catches a case investigating a murder and finds help from Arian Foster, running back for the Houston Texans.
The daughter of a murdered Lua master comes to Hawaii Five-0 for help. Steve decides to have a private investigator keep tabs on his mother.
A man who was injured years ago begins taking revenge on the police officers who caused his injuries, including Steve whose father was one of the officers responsible for his maiming.
The team is directed to investigate when a prostitute is murdered in a Congressman's home, who is nowhere to be found. Danny has his own drama as the custody hearing regarding Grace goes to court.moreless
Chin is kidnapped and taken to the Halawa Prison, where he is dressed as an inmate. He must find a way out before his identity is revealed.
When Steve arrests a man who attempted to car jack him, he meets a young boy at the station, who peaks his interest. The boy's father is missing and Steve decides to help him, being concerned that the father may be in real trouble.moreless
A camping trip with Grace doesn't turn out as planned when an armed man takes Steve and a little girl hostage. Kono meets Adam's dodgy brother just out of prison.
While Danny gets assigned to protect a Victoria's Secret model, Max and Sabrina find themselves in danger when a bank robbery goes awry.
When a therapist's patient is murdered, Steve finds evidence that the therapist may be involved. Catherine finds herself mixed up in Doris' past, when a former target is looking for payback.
Steve attempts to arrange a reunion between his mother and sister. When a young computer hacker is murdered Hawaii Five-0 steps in.
Forced to remain completely immobile, Danny tells Steve about his toughest case when he was a cop in New Jersey while bomb techs try to disarm a bomb he inadvertently triggered.
Steve's attention is divided between their current investigation into a Polo players murder and the return of his mother.
Steve and Danny take some time off to enjoy a little fishing only to find themselves stranded and facing pirates.
The team goes after Wo Fat and Delano for the death of an important person. Steve must resolve the issues between him and his "dead" mother, once he finds her alive and well.moreless
McGarrett captures Wo Fat in a special ops raid but he learns that the Yakuza have been trailing them and both of them are marked for death.
Hawaii Five-0 needs help when they encounter a terrorist who states that he has a deadly virus and will release if his demands are not met. The NCIS counter terrorism team stationed in Los Angeles sends over two of its agents to assist the HPD.moreless
Max reveals some revealing information about his childhood in order to convince Five-0 that a serial killer is on the loose.
McGarrett tracks down August March, a former diamond smuggler, to help clear his sister when she's arrested for smuggling conflict diamonds.
Five-0 investigate the mysterious death of a radio DJ and uncovers evidence that leads them to Tony Archer, a local PI and retired NYPD bomb expert.
A Hawaiian history buff tries to help Five-0 with their investigation of a man dressed as a Hawaiian NaKoa warrior who was found murdered in the jungle.
When the actions of Five-0 almost result in an international incident, Lt. Governor Denning announces that one team member will lose their job.
A crooked cop who is seeking revenge against Danny decides to visit the island, putting Danny and his family in jeopardy.