Gibbs heads to Mexico to face his demons and make a startling decision.

When a colleague's murder sends shockwaves through the team, Gibbs uncovers a surprising link to the crime.

The team tries to track down a serial killer, while Abby heads south of the border to give a speech with McGee in tow.

When an NCIS polygraph specialist's night job takes a dangerous turn, Gibbs, Fornell and the team have to uncover the truth.

Gibbs ask Holly Snow to help them to investigate a murder in the world of professional call girls, what will cause troubles to the Team.

The team and Coast Guard Investigative Services join forces when a Navy diver seeking sunken treasure is murdered.

Gibbs and the team investigate the shooting of a Marine and uncovers more to his life than anyone would have ever imagined.

Gibbs is forced to revisit his painful past when his ex mother-in-law turns out to be a witness in a murder investigation.

After one of the drivers of a shady shipping company is found dead, the NCIS team has to go on the road to take down the illegal activities along with the FBI.

The NCIS team has to thwart an attempt by a group of terrorists to detonate a bomb before it's too late.

While on the flight back from Paris, Tony and Ziva realize that their assignment to protect a government witness in an embezzlement case is in great danger when they learn that an assassin is located on the same flight.

Gibbs is worried about Tony's ability to handle his job when Tony's father turns out to be linked to their newest investigation, an assassination attempt on a foreign prince.

While investigating a bizarre murder of a Navy pilot, the NCIS team butts heads with an attorney that has a grudge against Gibbs.

The NCIS team is called in to investigate the death of a reverend's enlisted son, and they soon realize he may have been the victim of a hate crime. Meanwhile, Gibbs tries to figure out why his father had a sudden change of behavior when he comes to visit during the holidays.

When a death of a Marine leads the NCIS team to a government think-tank filled with child prodigies, the team has to protect a 12-year-old child who may be the next target of the killer.

The team needs to use other resources when an attempted robbery leads to the death of a Lieutenant and the entire city suffers a major blackout.

Vance's family is once again put into danger when an assassin from his past returns to threaten their safety, and the team works on helping Vance face his troubled past.

When one of Gibbs' boats is found with two murdered soldiers, Gibbs is forced to investigate the involvement of his mentor Mike Franks, and prevent a possible international confrontation.

When a Marine known for his love of practical jokes is found dead on Halloween, the NCIS team is called in to investigate, and they soon learn that his jokes may have been the reason why someone killed him.

The NCIS team is called in to investigate the murder of a Marine found halfway around the world, and the investigation takes a surprising turn when Ziva turns out to be connected to the deceased Marine.

When a blogger that accused NCIS of a cover-up turns up dead, the NCIS team has to find out who killed him and take another look at the closed case.

Gibbs is forced to dig into the past when a murder of a Marine and his two friends turns out to be linked to his team. Meanwhile, Gibbs faces a tough challenge as he holds Ziva's fate in his hands.

With the past still left unresolved, the NCIS team must find a way to put it aside and concentrate on another investigation, but while looking for Ziva's replacement, the team comes to a stunning revelation.