|Episode Online Video|
S04, E01 (First Aired:
The NCIS team must learn to work without Gibbs, who has retired; Ziva witnesses a political assassination and the FBI wants her.
S04, E02 (First Aired:
NCIS temporarily reinstates Gibbs when an escaped convict threatens his friend's life.
S04, E03 (First Aired:
While searching the abandoned and bloody car of a missing Navy lieutenant, the team learns she had been profiling men to find the perfect mate.
S04, E04 (First Aired:
The team is called to the scene of the murder of a petty officer who was part of an undercover arms operation.
S04, E05 (First Aired:
The team investigates the death of a missing lance corporal, whose body was buried in the backyard of a vacant house and then exhumed.
S04, E06 (First Aired:
The NCIS team investigates when a Marine is attacked in his home and his daughter is kidnapped on Halloween; Abby's Halloween costume leaves McGee and Tony speechless.
S04, E07 (First Aired:
Gibbs' team works with the Army Criminal Investigative Unit to investigate a suspected terrorist attack that killed a Marine colonel at a military country club.
S04, E08 (First Aired:
Suspicious activity surrounds a decorated Marine veteran's death, leading the NCIS team to try to clear his name.
S04, E09 (First Aired:
McGee takes things into his own hands, forgoing NCIS procedure, when his sister arrives on his doorstep, bloodied and confused.
S04, E10 (First Aired:
The NCIS team joins forces with the FBI when a burned and mummified body found in a furnace turns out to be that of a serial killer the FBI had been chasing for more than a decade.
S04, E11 (First Aired:
A highly classified robotic vehicle causes the death of a Navy lieutenant working on a high-level project for the Department of Defense; Tony's secretive trips to the hospital worry Ziva.
S04, E12 (First Aired:
The team battles local biases when it investigates the murder of a high-level Marine intelligence officer found in a small-town motel room.
S04, E13 (First Aired:
The NCIS team must track down a wanted terrorist (Enzo Cilenti) who has obtained a missing chemical weapon before he carries out his plan to attack major U.S. cities.
S04, E14 (First Aired:
Ducky goes under cover to stop the illegal sale of the Navy's top-secret weapons system to a high-priority arms dealer (Armand Assante).
S04, E15 (First Aired:
When a young sailor's body is found in an abandoned building in a seedy part of town, an ominous message written in blood leads the team to switch gears to find the killer.
S04, E16 (First Aired:
The NCIS team suspects foul play when a Navy lieutenant is the victim of radiation poisoning; Tony sees a softer side of Ziva.
S04, E17 (First Aired:
When an explosion at a military cemetery's mausoleum reveals a cache of dismembered human remains, the team searches for a potential serial killer.
S04, E18 (First Aired:
With a young Marine on life support, the team tracks his movements in the days leading up to his being left for dead.
S04, E19 (First Aired:
Cassidy (Jessica Steen) blames herself when the team learns that a tip on terrorist activity was a trap that resulted in the deaths of two agents.
S04, E20 (First Aired:
When a petty officer on whom McGee based a character for his latest book is murdered, McGee must figure out who could have accessed his secret manuscript.
S13, E22 (First Aired:
Gibbs suspects that a 14-year-old who stopped a home invasion is holding back information; Vance and Fornell head to London as part of the case involving the escaped British spy.
S03, E05 (First Aired:
Members of the NCIS squad investigate when a petty officer with a double life is gunned down on a freeway.
S03, E16 (First Aired:
When an ambulance mysteriously explodes while transporting the remains of a Marine, Gibbs and the team find that identifying the remains is harder than they had expected.
S03, E17 (First Aired:
NCIS team members search a missing Marine's campsite and realize he was not alone, so they search for his camping partner, a woman who may still be alive.
S03, E18 (First Aired:
A teen at a high school on Quantico Marine Corps Base attaches a bomb to his body and holds his fellow students hostage.
S03, E19 (First Aired:
Gibbs and the team investigate when the body of a missing Marine is found in a frozen lake.
S03, E20 (First Aired:
Gibbs and his team must investigate the apparent suicide of a Pentagon cryptographer some suspected of spying.
S03, E21 (First Aired:
Abby becomes the target of a stalker, sending the team into protective overdrive, searching for the person who is out to get her.
S03, E22 (First Aired:
Ziva finds herself under investigation for the death of a suspect; Director Shepard is kidnapped.
S03, E23 (First Aired:
Gibbs' long-suppressed memories overwhelm him as he recovers from injuries he sustained in a terrorist bombing.
S03, E24 (First Aired:
Gibbs suffers a temporary memory loss as he recovers from his injuries; the team tries to prevent a terrorist attack on the U.S. Navy.