Spectacular action drama following the crime-fighting exploits of the elite Major Case Response Team of the Naval Criminal Investigative Service. As the primary law enforcement and counter intelligence arm of the United States Navy, the NCIS team must tackle all manner of criminal offenses from high profile murders to terrorist bombings and kidnappings. Season 6 sees NCIS leader Agent Gibbs take up the task of finding a mole within his team and the introduction of the Los Angeles branch of NCIS which was later given a spin-off series of its own.