1.
We are introduced to Charles Augustus Magnussen.
2.
Watson makes us swoon as he heroically enters a crack den to find his friend's son.
3.
Sherlock has a girlfriend?! WTF?!
5.
Sherlock uses his mind palace to help him survive.
6.
Magnussen likes to flick faces too, it seems.
7.
Sherlock shoots Magnussen.