In order to capture an important Target, the squad goes to Syria.
When their helicopter is shot down in Syria, the operation fails, and Kensi suffers serious injuries.
The NCIS LA team is short two members while it looks into a kidnapping case.
NCIS discovers a warehouse of fake handbags and a trace of stolen government cash when a Homeland Security agent is poisoned by an infamous Triad assassin.
Sam helps Hetty with the current spy investigation as Anna Kolcheck teams up with Callen.
A local teenager is put in danger when the team learns about the maintenance worker's troubled history after he saves the life of a lieutenant commander.
In order to track down an NSA agent who disappeared while following an ISIS member trying to cross the border, Callen goes undercover as a patient in a mental institution.
The team finds a link to a global war when a graduate student working on an electromagnetic weapon for the Navy is assaulted.
In the course of a radiation poisoning investigation, Callen is forced to question his father after finding him in a patient's hospital on NCIS.
Nell sees a prisoner who is hiding details concerning the department breach.
While looking into the disappearance of a Navy Lieutenant Commander who was collaborating with the NSA on international cyber threats, the team enjoys the holidays.
Sam is sent to work undercover for a private security company to track out the murderer after a Navy reserve is killed while defending a local politician.
Sam, Callen, Granger, and Deeks are team members who are arrested as a result of a planned conspiracy, and their precarious situation quickly gets worse.
The mole holds an agent hostage, and Hetty goes rogue.
While another gets betrayed by an unexpected person, an agent is being held captive and tortured by the mole at an unidentified place.
The NCIS team finds two criminals after a resident of a retirement home is abducted.
Callen and Anna's romantic evening is cut short when Hetty gives them a prisoner transport assignment.
When the Treasury Department gets hacked and the crime is connected to an adept at technology husband and wife, Nell and Eric go undercover to a couple's retreat.
In order to track down an engineer seeking to sell the designs for a missile destroyer, Sam and Callen take a plane to Tokyo while pretending to be businessmen.
The NCIS team looks into Rebecca Larmont, a defense contractor who is creating a nuclear weapon.
In order to find a Navy captain who has been mysteriously abducted, Hetty's Vietnam War veterans partner up with him.
The team collaborates on an investigation into a gold robbery with Hetty's former Vietnam War comrades.
The kidnappers demand Tahir Khaled, Sam's enemy, be released from prison after kidnapping Sam's wife, Michelle, from her house.
In an effort to prevent Tahir Khaled from ever again threatening his family, Sam Hanna leaves the NCIS team and goes rogue.