Moffat: I find every time watching this, in the edits and the temp versions and everything, the surging of the music and the unbeatable logic of it, it just makes me cry every time. I think it’s fantastic.
Lara: It’s where you really see the mirror of the two them.
Moffat: [Sherlock leans into Irene] That’s not in the script. Was that you Benedict?
Benedict: That was my idea. Because I like the idea of him being in shadow, because it’s such a dark thing he’s playing with: deconstructing love into pure chemistry.
Lara: And this just broke my heart.
Moffat: No, it’s horrible. The idea is that you should start the scene hating her and end it hating him.

Sherlock: A Scandal In Belgravia commentary