JAG spin-off series NCIS centres on the Naval Criminal Investigative Service a crack team of government agents that operates outside the military chain of command These special agents traverse the globe investigating crimes linked to the Navy or Marine Corps – from murder & espionage to terrorism & stolen submarines More than just an action-packed drama NCIS shows the sometimes complex always amusing dynamics of a team forced to work together under high-stress situations Series 2 sees the tragic loss of Special Agent Caitlin & Kate& Todd (Sasha Alexander DAWSON&S CREEK) in an explosive finale