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.

The death of a petty officer leads the team into a search for a missing infant; meanwhile, Tony is forced to deal with the feelings he has for Jeanne.

A joint investigation ensues for Gibbs and Col. Mann due to the murder of a Marine captain who supposedly had access to highly classified information.

NCIS is able to tie a research cadaver that was mistakenly toe-tagged in the lab to a criminal mastermind who is able to erase pasts.

A naval officer plans to jump from a rooftop, and the team is called in to talk to him out of it; however, attempted suicide turns into a murder investigation.

A mysterious death, and a deadly secret, aboard a secret naval research ship has Gibbs and all of the team's lives in trouble.