After Callen’s cover is blown and compromises the unit, the NCIS team races to find out who is behind the security breach.

The NCIS team is on the hunt for a terrorist who escaped Army custody during a secretive transfer in Los Angeles.

The NCIS team races to save one of their own when they receive video evidence of Special Agent Dominic Vail being held hostage months after he was kidnapped.

LAPD liaison Marty Deeks helps the team find an infamous socialite connected to a Navy officer’s murder.

When an undercover operation has the NCIS team investigating a MMA gym and its fighters, Sam Hanna is tasked with donning gloves and entering the cage for a one-on-one fight.

When a Marine is killed in a drive-by shooting, the team fears his younger brother may also be targeted.

After a sailor is killed during an underground street race, the NCIS team determines that his car had been sabotaged and contained confidential Navy equipment. Meanwhile, Callen is forced to take traffic school.

The death of a lieutenant commander appears to be suicide but the NCIS team uncovers evidence corresponding to murder. Also, Operational Psychologist Nate Getz joins Special Agent Kensi Blye in the field.

Agent Kensi Blye is shot at a local bank and the shooters are now holding every people as a hostage.

A crime scene poses a national security risk when the LA team discovers the location was used to create a deadly toxin which is now missing.

The team rushes to a crime scene after receiving an “agent needs assistance” page and learns that one of their own is in peril.

Callen takes on a mission by himself when a parolee is murdered. The team keeps track of him from a distance as Callen resurrects one of his old identities.

When a Petty Officer is murdered, a connection to Sam’s life is discovered. Hetty takes a closer look at the team and how they are handling the pressures of the job.

When a Marine is killed by an exploding cell phone, the team investigates his former unit, which specializes in explosives, to see if its members are suspects or potential victims

Abby Sciuto (Pauley Perrette) joins the Los Angeles team to investigate a chief petty officer’s murder that matches the pattern of a serial killer Abby is tracking.

While Hetty is attending a Senate hearing in D.C., the investigation of a murdered Marine Lance Corporal leads the NCIS team to stolen anti-tank missiles and a dangerous militia group.

Callen finds out why he was targeted over six months ago, while investigating the death of a Russian.

The NCIS team must find a motive when they discover the body of a marine who had been living a double life as a wealthy bachelor.

When a United States citizen of North Korean descent is murdered, the secrets to classified software are thought to be lost until NCIS uncovers a suspect from Director Vance’s past.

Following a murder, the secrets to classified software are thought to be lost until NCIS uncovers a suspect from Vance’s past.