The Naval Criminal Investigative Service's team, led by Special Agent Leroy Jethro Gibbs, conducts criminal investigations involving the U.S. Navy and Marine Corps.
When an assassin targets the government's key witness in an embezzlement case, the team must help the witness make it home alive.
A terrorist group threatens to detonate a dirty bomb in Washington, D.C.
Fornell, Gibbs and the team try to bust an illegal trucking operation after a driver is found dead.
Secrets arise when Gibbs' former mother-in-law (Gena Rowlands) becomes a witness in a murder investigation.
While investigating a Marine's shooting, the team uncovers more to his life than anyone would have imagined.