[Sherlock's anger starts to bubble up when Khan turns to argue with him directly, but John cuts both of them short. Much like Khan, he stops in his tracks, frowning plainly at them both. He's not ready to attack or defend in any physical way because that's not how this fight is playing out. A battle of wits is a much better playing field for him.

He'd interject with a comment towards John, but Khan's already doing it for him.]

Oh, don't you go and make this my fault!

[Sorry, John, but there's no way he and Khan are going to come out of this as best friends. He takes a few pointed steps towards the Augment.]

I did everything I could to minimise the damage with that woman and Moriarty's been a liability since the day we met.

[The day him and John met, specifically.]