NCIS Director Shepard continues her hunt for Le Grenouille, the elusive arms dealer who still haunts her

Gibbs and the team look for a potential serial killer when an explosion at a military cemetery mausoleum reveals a cache of dismembered human remains

The NCIS team investigates when the body of a young sailor is found in an abandoned building in a seedy part of town

Ducky comes out of the autopsy room and goes undercover to stop the illegal sale of the Navy's top secret weapons system

An elderly Medal of Honor recipient, Ernie Yost (guest star Charles Durning), shows up at NCIS headquarters and confesses to murdering his best friend during a battle at Iwo Jima almost 60 years ago. Gibbs gut tells him there is more to the story and, with the help of his team who is captivated by the warmth of the honored veteran, they work to solve the mystery and keep Yost from going to prison and losing his Medal of Honor.

Ducky finds a bra in the autopsy room and ask Palmer if he knows how it got there

Gibbs is nearly hit during a knife tossing incident

While the team attemps to apprehend a suspect, McGee is forced to shoot him

Tony stuns the team with his tech talk

Flanked by Ziva and Abby, McGee enters a nightclub to gather intel on a suspect