When Danny is forced to remain completely still while bomb technicians disarm a bomb that he has accidentally almost triggered, McGarrett distracts him by getting his partner to tell the story about his toughest and most emotional case from his days as a cop in New Jersey.
Max and his crush (Rumer Willis) get put in harm’s way when a botched bank robbery leads the team to determine that the criminals had very unexpected motives. Meanwhile, Danny is stuck with the tough task of coming to the rescue of the most beautiful women in the world when a stalker goes after a Victoria’s Secret model.
An Aloha Girls camping trip with Grace turns deadly when an armed man takes McGarrett and a little girl hostage. Meanwhile, Adam introduces Kono to his dangerous brother who was recently released from prison.
Danny and McGarrett investigate the murder of an Oahu University professor whose body is found decomposing in a tub of acid and his boss, his teaching assistant and a student who he busted for cheating are all viable suspects.
As the island prepares itself for the Pro Bowl, an executive from a California technology company is found dead after a tactical ops team building exercise. Unexpectedly, a star running back from the football game (Arian Foster) winds up helping Five-0 during the investigation.
While apprehending his latest fugitive, Dog the Bounty Hunter is witness to a woman falling off a balcony to her death. Five-0's trail leads them to discover that the victim lead a double life as a roller derby player. Unable to get any useful information about the victim from her teammates, Catherine is asked to go undercover as the team's jammer. Doris comes home to find a burglar robbing her stash of sensitive information.
When threats turn deadly against a tour company that endangers the local shark population, Five-0 faces the difficult task of narrowing down the suspect list. Meanwhile, the team debates whether or not Kamekona will earn his helicopter license.
When the body of a young girl who was kidnapped 10 years earlier is discovered, Five-0 must hunt down the kidnappers who have now taken their next victim. Meanwhile, Kono asks Catherine for a favor that could damage her relationship with Adam.
When a plane lands on Oahu with four bodies on board and a missing terrorist detainee, the CIA tasks Five-0 with finding him before he carries out an attack on U.S. soil. Meanwhile, Kono is on the run from the police for a murder she did not commit, and McGarrett’s prison visit to Wo Fat ends with a shocking discovery.