Series 1 / Episode 6
Two crewmen aboard a ship have overdosed on meth, but they both insist they don't use - and recent, random drug tests confirm their claims - so Gibbs, Tony and Kate board the carrier to unravel the mystery behind their critical condition.
Series 2 / Episode 4
The NCIS team is called in to investigate when a body dressed as a Navy lieutenant is discovered apparently raped and murdered.
Series 2 / Episode 5
A body found on a Marine firing range leads the team to discover a Mafia dumping ground.
Series 1 / Episode 7
An eco-terrorist cell has targeted a submarine with an inside job, and Gibbs and the others must determine which crewman is the cell's plant - and halt his deadly plan.
Series 1 / Episode 8
A sailor's death from ingesting emeralds leads the agents to Guantanamo Bay, where they must thwart a terrorist's plot to kill one of his own.
Series 1 / Episode 9
A marine is killed on a covert CIA mission but shortly after his funeral, he apparently phones his wife, forcing NCIS to determine if his death - or the call - was a hoax.
Series 1 / Episode 10
The agents are called in to investigate when a woman who has been buried alive emerges from a shallow grave, with no memory of who she is, but certain a bomb is going to detonate soon on a Naval ship.
McGee is held captive in a women's prison after a guard's murder leads to a takeover.
Series 1 / Episode 11
A CIA employee unwittingly witnesses a murder via satellite and - after his anonymous tip - the agents try to determine why a Navy Lieutenant was stabbed to death while testing a high-tech, classified device.
Series 2 / Episode 6
The NCIS team protects an Iraqi War veteran who is the target of terrorist threats.
Series 2 / Episode 7
Gibbs and his team must clear the name of an elderly Marine who confesses to murdering his best friend nearly 60 years ago.
Series 1 / Episode 12
When a severed leg with a Semper Fi tattoo is discovered, the agents try to identify the body it belongs to, leading to a case involving another murdered marine from two years ago.
Series 1 / Episode 13
When a sniper kills two marine recruiters, the agents must find the culprit before he strikes again.
Series 1 / Episode 14
The agents must determine why a serial killer is targeting the officers at Oceana naval base.
Series 1 / Episode 15
When Gibbs' former commanding officer goes AWOL from Iraq, he must clear him of absconding with millions of Hussein's found money - and murder - in the midst of the man's insistence on uncovering a dangerous conspiracy.
After Ducky is stabbed at a crime scene, the team uncovers disturbing secrets from the good doctor's past.
Series 1 / Episode 16
As Ducky and his assistant Gerald prepare to perform an autopsy, a gun-toting terrorist emerges from a body bag to take them - and eventually Kate - hostage, leading Gibbs and Tony to determine the terrorist's ties and thwart his efforts.
Series 2 / Episode 8
Gibbs and his team are summoned to examine the mysterious death of a Navy commander who, after successful open heart surgery, seemingly bursts into flames.
Series 2 / Episode 9
Gibbs and his team are called to the scene when a Marine's wife kills an intruder who tried to rape her.
Series 1 / Episode 17
A petty officer's death at an underground rave leads the agents into an investigation that seems mired in confusion and points to possible kickbacks, a femme fatale, and practical jokes.
Series 1 / Episode 18
When an ex-Navy SEAL convicted of murdering his wife escapes from Leavenworth, the agents realize he has uncovered a shocking revelation and must track him down before he seeks deadly vengeance.
Series 1 / Episode 19
When a fellow NCIS agent is murdered during the investigation of a cold case, the others vow to solve the mystery and catch his killer.
Series 1 / Episode 20
A marine going missing leads Gibbs, Tony and Kate to discover other men he served with have also been murdered, meaning an apparent serial killer targeting them is on the loose.
A slain sergeant's private life is on full display as the team must determine if a suspected act of treason lead to his death.
Series 1 / Episode 21
A marine's gruesome death leads the agents to a marine base boxing ring, an agency sting, and his role in selling highly explosive assault weapons on the black market.
Series 2 / Episode 10
The team must work together to find Tony when he disappears during an undercover operation.
Series 2 / Episode 11
The NCIS team investigates when the body of a naval officer missing for 2 years turns up on the bottom of a lake.
Series 1 / Episode 22
During a training exercise that is a prelude to a top-secret mission, a highly-respected Navy SEAL plummets off a cliff to his death and the agents have less than 48 hours to find his killer or the mission could be stalled.
Series 1 / Episode 23
Still obsessed with the Hamas operative who held some of his team hostage months ago, Gibbs is determined to catch the man who re-surfaces in D.C. to kidnap Kate and hatch a plan to shoot down a helicopter carrying the President.
Series 2 / Episode 1
When the wife and 9-year-old blind daughter of a Navy captain are kidnapped, Gibbs and his team are faced with a unique challenge.
Series 2 / Episode 2
The NCIS team is called in to investigate when the decomposed body of a woman in a wedding dress is found in a cell beneath abandoned military housing.
While investigating the death of a Marine, the team finds themselves intertwined in an inner city gang war.
Series 2 / Episode 3
The NCIS team is called in to investigate when a perfectly functioning Marine helicopter is found in the middle of a crop circle.
Series 2 / Episode 12
The NCIS team investigates the possible murder of a petty officer that was reported by a telemarketer who heard it over the phone.
Series 2 / Episode 13
As he reassembles the pieces of three bodies found stuffed in barrels months ago, Ducky is shocked when he discovers their identities.
Gibbs and DiNozzo reverse roles after a murder leads to one of Tony's old investigations being re-opened.
Series 2 / Episode 14
Gibbs gives McGee a shot at running a case when the NCIS team is called to investigate when a woman claims to have witnessed the murder of a sailor.
Series 2 / Episode 15
Gibbs and the NCIS team investigate when a Marine records his own murder on video as he falls off a cliff.
The death of a NCIS agent leads Gibbs and Tony into the desert to locate a woman who holds the answer to the mystery.
Series 2 / Episode 16
The NCIS team investigates the bizarre death of a female petty officer who is found brutally murdered in the bed of a dance club bartender.
Series 2 / Episode 17
The NCIS team investigates when a pair of blue eyeballs are sent to a sailor in D.C. in a package from Paraguay.
A boxer's death leads Vance to start up his own investigation, causing a sparring match with Gibbs.
Series 2 / Episode 18
The NCIS team investigates when a petty officer who recently returned from duty is found dead backstage at a local bikini contest.