Tai, Monique, Brittany and more disclose how they caught their partners cheating along with scandalous tips, red flags and ticks on how to catch a cheater.
A high-level Marine intelligence officer is murdered in a small town, and the local law enforcement's interference makes Gibbs wary of their intentions.
Gibbs sends Ducky undercover to catch an international arms dealer, but Jenny's personal vendetta and a rival agency's interference hinder the operation.
An explosion in a mausoleum leads the NCIS team to discover the remains of five people, and they hope the families can make some connection between the victims.
Ducky is startled by a Marine, believed to have been frozen to death, when he wakes up before his autopsy begins; a trip to Baghdad is linked to Gibbs's past.
As Director Shepard continues her hunt for an elusive arms dealer, she set up a meeting with an informant, and the gathering turns deadly for her contact.
The team uncovers the stunning truth to the biggest secret of their careers as the final showdown in the arms dealer case reaches an explosive conclusion.
A familiar figure to the 118 is left in critical condition after a hit-and-run incident; Athena gets help from Buck to investigate a missing person case.