Yes, I'm embarassed to be slow (I like to think it's the heat!), but the desire to know is stronger 
I've watched the 'Scandal in Belgravia' yesterday, missed it the first time round, and didn't have a problem with other episodes, but I'm just baffled. They really talk TOO fast for normal human beings, especially in this weather - you need to rewind many times which is no guarantee either !
Anyway, I understand 'the woman' aspect almost, but please explain to me the plane plot. I don't get it why aer they furiuos with Sherlock for solving the code, and what WAS their original plan? WTF were these drugged(?) people on the plabe - surely they wre not dead? And what was the hiker's connectoin to it all (I understand how he got killed). As far as the woman, did they or did they not want her to work for them - and if not why on earth did they let her make Holmes to undo the code?Grrr, I've been dwelling on it all day.
Thank you!