Oh wow, Moffat wrote Coupling! Now there's a series I could curl up on the sofa and watch back to back again.
I've just watched ep. 3 with a notepad, but I'm none the wiser really. I think my TCP handshake thought earlier (then far better developed than I could have done!) might be too geeky, remember you always want everything to be clever, now shall we finish the game? As JM says on the rooftop
A few interesting things I've picked up. The yellow circle on the wall of 221B (the black flock wallpaper) has been shining out at me all series. I think it's a nod to Red John's graffiti in the Mentalist. The smiley face is also used in the O of Get Sherlock on the crown jewels cabinet. I don't think it means anything, but it's a nod to another Sherlock-off.
In the Hound, SH makes JW a coffee with sugar and JW says you never make coffee. This episode, he makes tea when he knows JM is coming round after the trial. In that conversation the phrases 'I own you', 'I'm going to burn you', and 'I owe you a fall' are all used. At the end of that scene, he picks up the apple with IOU carved in it and very vaguely smirks. I had to... ahem... collect myself at that point.
In the lab "the oil in the kidnapper's footprint will lead us to Moriarty". Eh? who said kidnapping the kids was a grand Moriarty case, could be just another small case. No, SH knows it's part of the set-up. But neither Molly nor JW in the lab call him up on how this case relates to Moriarty.
The wax seal is a bird on a twig. I had to pause. I don't think it's significant if you have to pause to see it.
When they find the kids he explains it - "Murder by remote control, he could be 100 miles away". Same as explaining the oil analysis while doing it, this is quite uncharacteristic perhaps? explaining as he goes rather than waiting for the baffled faces?
The third sealed envelope (the first two being the breadcrumbs and the book) is a Burnt Gingerbread Man. The Hansel and Gretel story involves Hansel detained elsewhere, Gretel realising that the witch means to kill her (specifically burn her in the oven) and asking the witch to demonstrate, which she does, bit of a shove, oven door shut, Gretel home free. Richard Brook was a 'kids TV storyteller'...
I don't think anything happens in the moment of privacy. It's not uncharacteristic either - "go away, I need to think".
When he steps on the ledge for the second time, after JM has shot himself, you see him stand on a blood stain. There has just been a scene of confusion, thinking what to do next and some whirly around camera work (technical term there). Has he pushed JM over perhaps? I think it unlikely but...
I really think that whatever happens does not happen in the rooftop to ground scene. That itself is a 'keep your eyes fixed on me'. However he "did it" was earlier.
And finally, my candidate for Best Line of the series is "no, nobody can fake being such an annoying dick all the time."
And goodnight.