Sasha Alexander

played Special Agent Caitlin "Kate" Todd [Seasons 1-2] in NCIS

Special Agent Caitlin "Kate" Todd is played by Sasha Alexander. Kate was a secret service agent and her job was to protect the President of the U.S.A. She then joined Gibbs' team because Gibbs got her fired from her job. On the last episode of the second season Kate was killed by Ari Haswari, Ziva's half brother.
  played Dr. Maura Isles in Rizzoli & Isles

I want to believe that there is a scientific explanation for everything that happens. It isn’t fate that sends a bicyclist flying over the handlebars to her death; it’s because her front tire hit a frost heave and kinetic energy took over. Fate has nothing to do with it. Death is not a mystical process; it is organic. I find that comforting. I knew, from an early age, that I was something of an odd duck. I was the child who hid out in her room for hours, reading, the child who dissected her dead pet mouse. I was the scholar, the accomplished pianist, the honor student. My parents understood that I was different, and although they were not people who'd crow loudly about anything, I always knew they were proud of me.

My devotion to logic and science drew me to the study of medicine. But soon after I began medical school, I realized that I wasn't meant to work with living patients. I wasn’t good at holding their hands, at ferreting out the unspoken emotional clues in their voices when they told me of their aches and pains. I can analyze x-rays and blood chemistries, I can slice open muscles and organs, but I possess no scalpel with which to dissect human emotions. So I became a forensic pathologist.

Boston is my home now. These cold New England winters suit me, as does my job as medical examiner. But I have little in common with the Boston PD detectives with whom I work. I think some of them may even be afraid of me, because I see their wary glances and hear their whispers as I walk past. And I know what they call me behind my back: “The Queen of the Dead.”