Parsons is worried about his project as a bomb explodes and ends the life of the SecNav. Gibbs joins a spec op and travels to Iran to meet Parsons. Tony follows Ziva in Israel.
Tony manages to locate Ziva in Israel but fails to take her home. Gibbs, Fornell, and others are doing their best in the bomber’s case. McGee finds out something that helps Gibbs with the case.
A building manager is killed after an explosion occurs inside a Navy Lieutenant's apartment, and the team investigates to locate the Lieutenant and the bomber.
A woman with an ID card of a sergeant in the US Marine Corps dies, and Gibbs and company handle the case. McGee discovers that the real sergeant passed away in Afghanistan three years ago. Gibbs and McGee head to Kabul to find answers.
Gibbs and company work on the murder of a Navy petty officer in Baltimore, Maryland. Tony finds a lead and a man at the crime's location. Abby makes some discoveries, and the shooter is captured.
A drilling station close to Virginia Capes is destroyed by a bomb. A Marine major consequently loses his life, and some people are wounded. Gibbs, Abby, and the team are tracking the case.
A Navy sergeant is killed during an alleged robbery at a men's clothing store in Washington. Gibbs and the team are investigating.
A woman Navy petty officer is killed at Quantico after being hit by a driver. Gibbs and the team find a suspect, yet he has a strong alibi.
After a bug is detected on the person of the SecNav, Tony communicates with NSA and finds a two-year-old document on this security breach.
The death of a Marine leads the team to find a connection between the current boyfriend of Diane Sterling, Gibbs and the ex-wife of Tobias Fornell.
Gibbs and the team take on the case of a number of children in Navy and Marine Corps families who are sent to the hospital for treatment after they fall sick.
As a Naval petty officer is shot in a park in Washington, Gibbs and the team work on the case and Hollis offers assistance.
The team sets out to catch the terrorist Parsa, while McGee is under shock from the events of the black-tie gala.
Ellie feels that Parsa is in his home district in NW Pakistan, and the SEAL are pursuing him. Gibbs, McGee, and Ellie travel there to interrogate him.
Abby demonstrates that a body armor found in an upside-down truck in Washington is malfunctioning and deadly. Gibbs and the team locate the driver's corpse.
Tony wants to interrogate a man who pretends to be a Naval officer. The man raises a gun at him, and Tony kills him. It turns out that the man is a private detective.
Prior to the start of a charity event in Washington, DC, a bomb explodes and kills a Navy officer, leading Gibbs and the team to probe the case.
Two local special agents try to solve the death of Dan McLane, a former NCIS Special Agent and a Congressman in New Orleans, Louisiana.
Gibbs and his team continue to search for the killer of a US congressman, while they discover that this case is related to an older one.
Delilah comes up with a piece of evidence that might solve a Navy lieutenant's death, but her boss required her not to reveal her new discovery. However, she secretly uncovers her clue to Tony.
Following the death of a Naval officer, Gibbs and the team take on the case and find a clue related to an old rape case.
A Marine photojournalist vanishes before giving a court testimony in the case of an Army lieutenant. As Gibbs and the team investigate, they locate the corpse of the Marine.
Tony travels to France to accompany the daughter of an admiral on the journey back to DC. Gibbs and the team are trying to solve a murder in the meantime.
The group are handling the case of a prison break without Gibbs as he goes to his father's funeral in Stillwater.