NCIS has time and again proven that the line of work it highlights is dangerous by killing off memorable characters, but these NCIS franchise characters died way too soon. Since the franchise deals with the investigative service of the military solving murders and uncovering terrorist plots, the main characters are always in the line of fire.

NCIS began its shocking tradition of killing off beloved characters when Caitlin Todd (Sasha Alexander) was shot by an assassin in season 2 of the flagship series. That death hit fans hard, but it also ushered in a new era for the show, bringing in Ziva David (Cote de Pablo).

NCIS also did not completely abandon Agent Todd following her death. Her family members had guest-starring appearances, she made appearances as a hallucination or in fla

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