NCIS: Los Angeles

After NCIS fails to locate a mole in the department, Under Secretary of Defense Corbin Duggan (Jackson Hurst) insists on new leadership and takes over the Los Angeles unit from Hetty and Granger.

The team travels to Syria.

The NCIS LA team investigates an abduction case while down two members, with Hetty being held in D.C. for questioning, and another still in the ICU following the mission in Syria.

After a Homeland Security agent is poisoned by a notorious Triad assassin, NCIS uncovers a warehouse of counterfeit purses and a money trail to stolen government funds. Also, Nell joins the team in the field.

The murder of a navy machinist with high security clearance sends the team on a city-wide hunt tracking evidence.

After a maintenance man saved the life of a lieutenant commander, the NCIS team uncovers his dark past which puts a local teenager in danger.

Callen goes undercover as a patient in a mental health hospital to search for an NSA agent who disappeared while tracking an ISIS cell trying to cross the Mexican border.

After a graduate student developing an electromagnetic weapon for the Navy is attacked, the NCIS team discovers a connection to international warfare.

After Callen's father, Garrison (Daniel J. Travanti) is found in an NCIS patient's hospital room during a radiation poisoning case, Callen must take him to the boatshed for interrogation.

After an unknown female assailant kills two men disguised as Sherriff's deputies in front of Callen's home, the NCIS team gets a new lead in the ongoing mole investigation.

Sam partners with Anna (Bar Paly) and Callen goes with Deeks as the team investigates the disappearance of a Navy Lieutenant Commander who is working with the NSA on foreign cyber threats.

After a Navy reservist is killed while protecting a city councilman, Sam is sent undercover in a private security firm with links to several criminal organizations.

The mole has once again compromised the NCIS team as planted evidence results in the arrests of Callen, Sam, Granger and Deeks, on the day Under Secretary Duggan (Jackson Hurst) returns for Hetty's resignation.

Hetty goes rogue, leaving the NCIS team completely in the dark, and the mole kidnaps one of the agents.

Emotions run high for the team as one agent is held in an unknown location and tortured by the mole, while another discovers he was betrayed by someone he least expected.

After a retirement home resident is kidnapped, the NCIS team uncovers a pair of con artists: Ginger and Edward O'Boyle (Debra Jo Rupp and Martin Mull), who hop from home to home scamming the elderly out of their money.

Sam assumes a former alias in a risky undercover operation to take down an elusive drug lord.

After the U.S. Treasury Department is hacked, Nell and Eric go undercover inside a couple's retreat to track a tech-savvy husband and wife linked to the crime. Bar Paly guest stars.

After an engineer who was developing a new guided missile destroyer is murdered, Callen and Sam go undercover to track his co-worker aboard a plane to Tokyo to sell the classified intel.

The NCIS team investigates a defense contractor, Rebecca Larmont (Shanna Collins), designing a nuclear attack weapon after her estranged husband, Victor Larmont (Lou Ferrigno Jr.), says he has proof she is selling Navy secrets to a foreign government.

After a highly decorated Navy Captain, Charles Langston (Carl Lumbly), kidnaps a Veterans Affairs administrator who has been siphoning funds, the NCIS team must work with Hetty's former Vietnam War colleagues, now-retired Admiral AJ Chegwidden (John M. Jackson) and Admiral Sterling Bridges (James Remar) to solve the case.

A gold heist investigation has the NCIS team working with Hetty's former Vietnam War colleagues, Retired Admiral AJ Chegwidden (John M. Jackson), Admiral Sterling Bridges (James Remar) and Retired Captain Charles Langston (Carl Lumbly).

After Sam's wife, Michelle (Aunjanue Ellis), is taken from her home, the kidnappers demand the prison release of Tahir Khaled (Anslem Richardson), Sam's arch nemesis, in exchange for information on her whereabouts.

Following the kidnapping of Sam's wife, Michelle Hanna (Aunjanue Ellis), Sam goes rogue from the NCIS team and attempts to stop his arch nemesis Tahir Khaled (Anslem Richardson) from ever targeting his family again. Erik Palladino, Anslem Richardson, and Aunjanue Ellis guest star.