I've finally caught up with this season, and I'm really enjoying it (with the occasional exception of Sherlock being crude about Watson's sex life). It's very much back on track and Kitty is a terrific addition. I love seeing her learn different things from each mentor and also learn Sherlock-wrangling skills from Watson. I was braced for Twilight gags but I really liked that the joke was the deep textual analysis and what a group of teenage boys find funny.