Kensi and Granger reunite with the rest of the Los Angeles NCIS team when the murder of a federal agent in Los Angeles might be tied to a possible terrorist attack.
NCIS delves into the reasons behind an attack on a senator's daughter. Deeks partners up with Nell to back up Sam and Callen in their effort provide security for the daughter. One of Kensi's co-workers gives her the ideal holiday gift.moreless
The NCIS team turn their attention to an alleged war criminal, a former Communist lead from Romania, when it's discovered he living in Los Angeles under an assumed name.
As Kensi and Deeks sort out their relationship, Callen and Sam call on a Nepalese Gurkha to help recover a missing flash drive.
The death of a naval officer sends Kensi and Deeks uncover at a rehabilitation facility.
With a nuclear terrorism attack looming, the team must find the stolen nuclear detection device. As the case proceeds, Hetty realizes someone from her past is back and could jeopardize her career.
The murder of a train yard security guard sends the team and Homeland Security after a mastermind who may be plotting a terrorist attack on a train.
A teenager's hacking skills get the attention of NCIS after he compromises terrorist missions.
While the NCIS team is investigating a kidnapping, Callen confronts the man who may be his father.
The team must locate the stolen nuclear weapons as Deeks and Sam must physically and emotionally recover from their ordeal.
Five-0 is assigned by the CIA to find a missing federal prisoner after the plane he is being transported to Oahu on arrives without him, but instead has four dead bodies. After being set up for a murder, Kono finds herself on the outs again with the police force. Steve has another surprising encounter with Wo Fat. Danny reconnects with Gabrielle.moreless
Doris needs Steve's help on a clandestine mission to take back an incriminating microfiche. Kono is in jeopardy whilst getting closer to finding out Adam's secret.
Five-0 looks for kidnappers after they discover the body of the previous victim from ten years ago. Even though it might harm what she has going with Adam, Kono asks a favor of Catherine.
Things turn dangerous for a talk show host and her crew following Five-0 around when they run into Wo Fat.
Steve reflects back on his last mission in North Korea as he and Catherine recover the remains of fallen soldier.
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
A member of a local roller derby team falls to her death in front of Dog the Bounty Hunter, as he is 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.
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.