 Leading the NCIS (Naval Criminal Investigative Service) team that operates outside of the military chain of command is Special Agent Jethro Gibbs, a highly skilled investigator and interrogator who is smart, tough and willing to bend the rules to get the job done. Working under Gibbs is Special Agent Anthony DiNozzo, a former homicide detective who joined NCIS just a few years ago but who has instincts that come only from working on the streets. Joining them are Agent Caitlin Todd, a tough former Secret Service agent who s gone head-to-head with Gibbs in the past, and forensics specialist Abby Sciuto, a gifted scientist whose dark wit matches her goth-style hair and clothes. Assisting the team is medical examiner Dr. Donald "Ducky" Mallard, who knows it all because he s seen it all. From murder and espionage to terrorism and stolen submarines, these special agents travel the globe to investigate all crimes with Navy or Marine Corps ties.