The hunt for man who tortured Kitty came to a satisfying conclusion on Elementary Season 3 Episode 12 and seemed to signal the end of Kitty's time on the show as well.
Once upon a time, I would have welcomed that news, but now, I'm going to miss her. She, along with Joan, really helped us see a side of Sherlock he doesn't show often - his human side. The side that actually cared about people.
We also saw how two prickly people truly saved one another by giving each other purpose when they were both lost.