Michelle Pierce

The team think that two people might be working together to commit a series of murders, taking leads from DVD footage of each crime provided by the families of the victims.

Terrorism shakes the foundations of the Navy and NCIS to such an extent that Gibbs and the team face surprises that may prove devastating.

Secrets are revealed when Gibbs' former mother-in-law becomes a key witness in a murder investigation.

When a Navy captain is murdered in his hotel room, the NCIS team must find his pregnant companion and protect her from unknown assailants. Meanwhile, Jimmy brings his future father-in-law to work.

When dozens of children from military families come down with a mysterious illness, the team try to deliver a cure before the holidays.

Jeff is surprised to learn the sexual orientation of his new friend, and Russell fears he might be dating a close relative.