This is a little stream of consciousness, bear with me.
There's been a lot of discussion about Sherlock being a gay show, or "the gayest show on TV" even. Part of this is that Mark Gatiss is gay, and Moffat is, well, Moffat. Don't get me wrong, it's a show that's chock full of homosexual innuendo, as well as strong openly gay characters (if Moriarty isn't gay I'll eat my hat). However, I'd have to say that from my perspective, it is a show that moves well beyond the binaries of love and sexuality. It's a full spectrum show.
Certain folks will know my personal preferences tend to be unusual (honorary lesbian, lol) and so that might be why I'm so drawn to a show like this. A show where the two main male characters (one repeatedly, avowedly hetrosexual) are clearly in love without (from my reading) having any sexual interest in each other. Meanwhile, in S02e01, an intensely sexualized relationship forms between a self-professed lesbian and a man whose sexual inclinations are a complete mystery even from his closest friends.
The fluid sexuality is something that has been coming out more and more in Doctor Who (which is part of the reason why The Wedding of River Song was a bit of a let down, frankly) but being a family show, although it pushes the boundaries tremendously, it can't quite explore it to a level that it should. Torchwood could, but it failed to explore nearly any new sexual dynamics this past season. So as far as sexual politics on TV go, Sherlock is rapidly gaining my highest expectations. So far it's done nothing to disappoint. I can't wait for next week.