Gibbs fights for his life aboard a Navy hospital ship after being shot, while DiNozzo and Joanna Teague travel to Shanghai to try and take down the Calling, on the 13th season premiere of NCIS.
When a petty office is murdered, the crime matches a local serial killer's method of operation; Delilah and McGee prepare to move in together.
The NCIS murder case of a retired Navy Lieutenant Commander forces Ducky to reveal his participation in a secret society that solves cold cases
DiNozzo is reunited with his ex-girlfriend, Jeanne Benoit, when insurgents in 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
After the passengers and crew of a private plane traveling from New Orleans to Washington D.C. are lethally poisoned, all evidence points to the missing chef, Abby's brother, Luca. Gibbs and the D.C. team work in conjunction with Pride and the New Orleans team to locate Luca and determine why a private tech company was targeted.
While investigating the murder of a seaman who was set to testify before a grand jury, the NCIS team uncovers the resurgence of an international human-trafficking ring. Also, McGee hopes to spend the night at a colleague's home after a storm causes massive power outages in the city
A strange investigation takes place after the body of a murdered deep-sea diver and his suspected co-workers has to stay in a decompression chamber for four days.
When Secretary of the Navy Sarah Porter learns her daughter has been kidnapped, the NCIS team partners with the FBI to track the case, determine a motive and bring her home. Also, McGee's childhood friend, NCIS Special Agent Valerie Page, is in town to assist the team with advance tactics training.
Doctor Cyril Taft experiences the rush of an NCIS case after he is assigned surgical duty to Gibb's suspect and finds key evidence. Also, Dinozzo pays Jeanne Benoit a visit as he chases a lead involving doctors in Sudan.