NCIS searches for a missing undercover agent in the midst of an active hostage situation.

When a shocking tell-all threatens to ruin Christmas for a decorated Marine, NCIS must uncover the truth and deliver a holiday miracle - before the book hits shelves and turns a hero's legacy into a holiday disaster.

After NCIS captures the hitman known as "The Poet," the team races to uncover who ordered the assassination of a Navy chief.

McGee's career and credibility are on the line when he investigates the deputy director for corruption; Torres and Knight receive some surprising news.

As NCIS investigates a dangerous connection between the Nexus cartel and Parker's longtime nemesis, mob boss Carla Marino, the team uncovers a high-stakes plot involving stolen nuclear material. With time running out, Parker is forced into an uneasy alliance that could determine the fate of the operation - and his own future