If we're playing this from the standpoint of knowing she had to leave the show and killing her off is the only option, then I think it would have been beautiful for her to die in "Change of Heart." I loved the scenes with her and Worf. I know that's too early and it's not really part of the story that unfolds toward the end of the season, but I was even thinking as I watched it...if she dies, this is going to be heart-wrenching.