NCIS: Season 4
Season four of NCIS extends the series' ongoing storyline across twenty‑four episodes, continuing the work of the Naval Criminal Investigative Service team as they confront a range of high‑stakes cases. The agents investigate murders that intersect with covert espionage operations, confront terrorist threats that endanger national security, and pursue the recovery of a stolen submarine. Throughout the season the ense
Season 4 Lore Primer
Key plot threads, lore context, and character stakes you need to remember before diving into this season.
- NCIS follows a team of special agents who investigate crimes involving the U.S. Navy and Marine Corps.
- The team is led by seasoned investigators Leroy Jethro Gibbs and Alden, who guide the agents through complex cases.
- Created by Donald P. Bellisario and Don McGill, the series features actors such as Sean Murray, David McCallum, Mark Harmon, and Brian Dietzen.
- Prior seasons established the team's investigative methods and personal dynamics, setting the stakes for confronting murder, espionage, terrorism, and stolen military assets.
Season overview
Season four of NCIS extends the series' ongoing storyline across twenty‑four episodes, continuing the work of the Naval Criminal Investigative Service team as they confront a range of high‑stakes cases. The agents investigate murders that intersect with covert espionage operations, confront terrorist threats that endanger national security, and pursue the recovery of a stolen submarine. Throughout the season the ensemble balances forensic analysis, tactical field work, and inter‑agency coordination while navigating personal dynamics within the team. The narrative maintains the series' blend of crime, drama, and action‑adventure, emphasizing the investigative rigor and resilience of the NCIS personnel as they protect the Navy and Marine Corps from complex criminal activity.
Episode Guide
Season 4 Progress Shield
Shalom
Sep 19, 2006
When Ziva is framed for a political assassination, she must avoid the FBI and deal with the consequences without Gibbs' help, who is now enjoying his retirement.
Escaped
Sep 26, 2006
Gibbs is forced to come back out of his retirement to help Fornell, who is being threatened by a convict that escaped from prison. Gibbs and the NCIS team re-open the convict's old
Singled Out
Oct 3, 2006
An abandoned car, registered to a missing Navy Lieutenant, is found with blood stains inside. The NCIS team learn that the missing Lieutenant was profiling men, trying to find a pe
Faking It
Oct 10, 2006
After police pull over a driver and arrest him for a concealed weapon, a car crashes into their patrol car with a dead man behind the wheel. The arrested man turns out to be Russia
Dead and Unburied
Oct 17, 2006
When a missing Lance Corporal is found dead in a vacant house, the NCIS team discover that he was buried in the backyard and then exhumed. They learn about his identity and that he
Witch Hunt
Oct 31, 2006
It's Halloween and the NCIS team are busy investigating a ransom case. A Marine's daughter has been kidnapped after the Marine was attacked in his home. The investigation leads the
Sandblast
Nov 7, 2006
When a Marine Colonel dies in an explosion at a military golf course, the NCIS team must investigate a suspected terrorist attack with the help from the Army Criminal Investigative
Once a Hero
Nov 14, 2006
When an honored Marine veteran is found dead in a hotel, the NCIS team must find out what happened to him. Soon they realize that the Marine didn't commit suicide and that he was a
Twisted Sister
Nov 21, 2006
McGee breaks the rules, risking his NCIS job, to help his sister Sarah, who shows up disoriented and bloodied. While he works on figuring out what happened to his sister, the NCIS
Smoked
Nov 28, 2006
When a burnt and mummified body of a missing and wanted person is found in a furnace on a Marine base, NCIS must work with the FBI. The burnt man turns out to be a serial killer.
Driven
Dec 12, 2006
When a robotic vehicle named "Otto," a part of a high-level project of the Department of Defense, causes a death of a Navy Lieutenant, and later almost kills Abby, the NCIS team mu
Suspicion
Jan 16, 2007
When a high-level Marine intelligence officer is found murdered in a small motel room, the NCIS team must find the person who murdered her. After discovering that she was already d
Sharif Returns
Jan 23, 2007
When the NCIS team learn that a missing ten kilograms of highly toxic chemical weapons are now in the hands of Mamoun Sharif, a wanted terrorist, they will have to find a way to fi
Blowback
Feb 6, 2007
After catching an international arms dealer, the NCIS team learn that the Navy's highly classified weapons system will be sold to arms dealer La Grenouille. To stop the transaction
Friends and Lovers
Feb 13, 2007
When a dead body of a sailor is found in an abandoned part of the town, all the evidence seem to point that the person died from a drug overdose, but when the team uncover more evi
Dead Man Walking
Feb 20, 2007
When a Navy Lieutenant becomes the victim of radiation poisoning, the NCIS team must find the person who's behind the crime. The Lieutenant, who is working for the International At
Skeletons
Feb 27, 2007
When an explosion at a military cemetery mausoleum reveals a crypt full of a mixture of body parts, the NCIS team must inform the families of the victims, hoping to find a connecti
Iceman
Mar 20, 2007
When a supposedly frozen to death Marine turns out alive on Ducky's autopsy table, the NCIS team have to find out about the victim's movements in the last few days to uncover what
Grace Period
Apr 3, 2007
When a weekend call to the NCIS tip line from an unknown source about possible terrorist activity results in the death of two agents sent into a trap, the NCIS team will have to fi
Cover Story
Apr 10, 2007
McGee is under high pressure during the murder investigation of a Petty Officer based on the character for his latest book, with very little information to go on.
Brothers in Arms
Apr 24, 2007
Director Shepard makes a huge mistake by meeting a man alone to inform her about La Grenouille, as their meeting turns into a murder of the informant. Now the NCIS team must gather
In the Dark
May 1, 2007
When a blind photographer shoots the body of a Petty Officer on film, the NCIS team use his special insight to investigate the crime.
Trojan Horse
May 8, 2007
When Jenny has to attend an overseas conference, Gibbs is made acting director, but he prefers to ignore his duties and lead the investigation of the murder of a man, who was found
Angel of Death
May 22, 2007
When Jenny returns from her European trip, the entire NCIS team will be forced to take a Homeland Security polygraph test, and the deepest secrets of each agent are about to be rev