I had a nagging sense of recognition throughout. There's something about the pace of it, and the comedy; even the youthful hero with the cheek and the cheekbones and the geeky chic - charming, attractive, but asexual . . . what is it reminding me of? And then it came to me! It's no surprise I suppose, given who's behind it, but I think Steven Moffat has created Sherlock Whoms.