Gibbs must take desperate measures to protect his loved ones with Paloma Reynosa still on the loose.
A girl's kidnapping turns into something bigger when her grandfather complicates the investigation.
The team investigates a bomb tech's guarded personal life after she is attacked.
The team hopes to avoid an international incident when an American officer is killed on a British ship.
The team uncovers a sinister plan when a controversial DJ and a naval officer are shot to death.
Abby becomes fixated on solving a murder; DiNozzo's latest fling leads to an interesting Halloween.
Dinozzo's father (Robert Wagner) returns and plays an important role in a murder investigation.
The team must protect Ziva's father when his attendance at a convention leads to surprises.
Following a deadly attack, one member of the team reminisces.
A Naval petty officer and sole witness in an upcoming murder trial disappears.
The team partners with a Coast Guard Investigative Service agent to solve the murder of a Marine on a dinner boat.
Dr. Mallard's predecessor, Dr. Magnus, joins the team to help solve a murder at a college fair.
The team investigates when a Marine is found beaten to death in his backyard.
While investigating a naval commander's death, the team undergoes required psych evaluations.
After a suicide bomber tries to assassinate the Belgravian Defense minister, the team must protect his daughter, who is studying in the U.S.; Gibbs looks into the death of a Marine who was killed in the bombing.
A murdered Marine's fingertips and teeth are found in a stolen purse.
The brutal murder of a former investigative assistant connects to a crew planning to rob a woman's warehouse; a new special agent (Sarah Jane Morris) arrives at the office.
Gibbs is suspicious when Vance asks him to interrogate a teenage boy accused of killing his retired Marine father.
A message in blood left by a murdered officer leads NCIS to a manuscript that may contain classified information.
Special Agent Barrett investigates a death she believes is connected to a series of murders; Ziva introduces her boyfriend to the team.
A Navy lieutenant's murder is caught on tape by a Pentagon security camera; Gibbs reveals that Agent Barrett and her team will take over a case involving a serial killer.
Tony revisits his days as a detective in Baltimore after learning that his former partner is likely the latest victim of the port-to-port killer.
After receiving new evidence that the Port-to-Port killer has infiltrated the agency, the team races to track him down.