The CIA gives them a lead to an abandoned warehouse.However, things take a sinister turn when both NCIS and Army CID invade and discover that it is actually a trap – the warehouse is rigged with a bomb set to go off any second.Also, albeit later in the season, Army CID Lieutenant Colonel Hollis Mann is introduced as another love interest for Gibbs.
Ziva goes against Gibbs' orders and is successful in defusing the bomb, preserving any evidence for both groups to use, but earns a brief reprimand from Gibbs for doing so.
In the meantime, Mc Gee uses his computer skills to break into the secret government files to uncover the terrorist cell while Tony embarks on a personal quest of his own as he attempts to stop the Marine colonel's son from dropping out of college and enlisting in hopes of avenging his father's death.
When they suspect that the kidnapper may continue attending the event in order to avoid suspicion, Ziva goes undercover at a speed-dating event to identify him.
In addition, Tony is offered a promotion – and his own team – as a reward for his performance as team leader while Gibbs was retired but declines and remains in Gibbs' team.
Abby runs the DNA samples from the two women to find out if the DNA is a match to the soil found on the dead man's body and later finds out that the team are looking for a third woman who might have been sleeping with the victim.