BRILLIANT! Just ridiculously delightful, especially the dialogue. Also I feel quite proud because I knew immediately what character mapped to every single name in the header -- the Grand Unified Theory of Hair (though not explicitly stated until the notes at the end) + the title made the logic of the massive crossover very, very, very clear. :) Basically, I adore this madly.

I felt a little pang for Sherlock, though, despite knowing that he's better off in London with John.