NCIS - Season 13 (2015)

Vance partners with Gibbs and returns to field duty when a murder case is connected to a former NCIS agent he put in jail for stealing evidence.

During an investigation, Abby is trapped in a pharmaceutical lab when armed men enter the building and take hostages.

When a petty officer is murdered, the crime matches a local serial killer's method of operation; Delilah and McGee prepare to move in together.

NCIS investigates the death of a retired Navy officer whose son was convicted of a murder 16 years earlier. A flawed forensic test from that time can prove whether the son is the real murderer or if he is innocent of the crime.

DiNozzo is reunited with his ex-girlfriend, Jeanne Benoit, when insurgents in South Sudan attack a group of volunteer doctors, including her husband. DiNozzo and McGee travel to the crime scene for the joint murder and kidnapping case and join the search for the missing doctors. Jon Cryer and Scottie Thompson return.

A Petty Officer, accused of killing an ex-girlfriend, is set free on mistrial. Professing to be innocent he asks NCIS to investigate and if necessary court martial him. Bishop and her husband have marital problems.

The Secretary of Defense turns to NCIS to help a sailor dying from leukemia locate a bone marrow transplant after two of his siblings are killed in the line of duty. Meanwhile, Bishop returns home to Oklahoma for Thanksgiving after learning of Jake's cheating.

After Ducky is attacked by a man claiming to have information about his half-brother who died decades ago, the NCIS team searches for the perpetrator, as Ducky recalls the final emotional days he had with his sibling. Also, with the holidays approaching, Bishop and Jake (Jamie Bamber) discuss the future of their relationship. Adam Campbell returns as "Young Ducky."

Gibbs and his team work with Pride and the New Orleans team to find Abby's brother and figure out why the passengers and crew of a private plane he catered were poisoned.

The investigation of a seaman's murder uncovers the resurface of a human-trafficking ring, while McGee hopes to spend the night with a colleague during a power outage.

The team investigates the murder of a deep-sea diver outside a high-tech decompression chamber where the body and suspects have to stay for four days.

The team partners with the FBI to rescue the kidnapped daughter of Sarah Porter.

Dr. Cyril Taft feels the rush of an NCIS case when he's assigned to operate on Gibbs' suspect and discovers key evidence.

The team member's plans are interrupted when they discover discrepancies in what appeared to be an open and shut case.

Gibbs tries to connect with a wounded Special Ops sniper when an American couple is attacked in the same area in Iraq where the sniper's team was ambushed.

The wife and mistress of a Navy Public Affairs officer accuse each other of murdering him, so the team must figure out who's lying.

Tony's identity is stolen by multiple perpetrators who proceed to blackmail senators.

A family owned mortuary ordered a bunch of caskets from an overseas company. When they go to unload the shipment, they find that one of the caskets already has a dead body. There are ties to a prison break of someone NCIS helped put away.

Gibbs and the team investigate a military home invasion thwarted by a 14-year-old, while Vance and Fornell head to London to continue pursuing the escaped British spy.

The team continues the international manhunt for an escaped British spy while a colleague fights for their life in the ICU.

The NCIS, FBI and MI6 teams continue the international manhunt for an escaped British spy who's targeting current and former agents. Anthony DiNozzo bids farewell to NCIS.