Gibbs and his team face a challenge when the wife and 9-year-old daughter of a Navy captain are kidnapped from their home, and the captain is held hostage in his own office.
Gibbs and his team investigate when the decomposed body of a woman in a wedding dress is found in a subterranean cell decorated to resemble a 1950s bedroom.
When a Marine helicopter appears in the middle of a crop circle, Gibbs and the team investigate and encounter a town convinced that extraterrestrials played a role.
The team investigates a Navy lieutenant's rape and murder; Ducky fears the killer is linked to an unsolved murder that has been haunting him for years.
The discovery of a civilian's body in a Marine bombing range leads the team to uncover a Mafia dumping ground, and Gibbs' partner, agent Fornell (Joe Spano), is accused of aiding the Mafia.
The NCIS team's assignment is to protect an Iraqi War veteran being targeted by terrorists.
A World War II Medal of Honor recipient (Charles Durning) confesses to the murder of his best friend almost 60 years ago.
Gibbs and his team investigate the unusual case of an unpopular Navy commander who, after successful open-heart surgery, apparently burst into flames.
When a Marine's wife kills the intruder who tried to rape her, Gibbs and his team realize they are tracking a serial rapist and killer who uses a racy Web site to stalk his prey.
Tony goes under cover as an escaped prisoner chained to a convict who holds the key to recovering stolen Iraqi art, but when his GPS device fails, the team must find other ways to locate him.
Gibbs and the NCIS team work with a notorious private detective during an investigation of a naval officer found murdered at the bottom of a lake.
The team investigates a telemarketer's report of the murder of a petty officer after hearing it over the phone, and it appears to be a hoax until the body of the officer is found.
When bodies found stuffed in a barrel are identified as a prosecutor and a sheriff who worked on a rape and murder case with Ducky 10 years ago, Gibbs believes Ducky may be the next target.
A computer expert (Danica McKellar) claims to have witnessed a murder in the apartment across the way, but investigators find no physical evidence of a crime.
A Marine records his own death on video, as he falls off a cliff during a camping trip with his wife and his best friend, and Abby tries to reconstruct the camera, putting her technical skills to the test.
When a female petty officer is found dead in the bed of a dance club bartender, the team suspects the officer's sister (Mya Harrison).
When a sailor in Washington receives a package containing a pair of blue eyeballs, Gibbs investigates a former Navy Intelligence agent who is now a private contractor in Paraguay.
A petty officer recently returned from duty is found dead backstage at a local bikini contest.
Ducky insists that the suicide of a female petty officer, institutionalized for a nervous breakdown, was actually murder.
Gibbs and the team investigate the murder of a Marine in an ROTC unit and quickly find a suspect, but they must start all over again when someone kills the suspect as well.
When a young woman is found dead in a storage unit, a Navy medic who died saving lives in combat becomes the prime suspect, and it is up to Gibbs and the team to clear his name.
When Tony opens a letter releasing a mysterious powder from inside, he and Kate are put into biohazard isolation as a precaution.