This was a magnificent episode which was intense on so many different fronts. The case itself was clever and unexpected - it was fascinating and it was pretty enjoyable to follow. Wasn't exactly a revelation what happened in the end, but it was interesting.
But the more interestign developments were with Mycroft who shows up today. There were very interesting scenes with Joan as he makes an interesting proposal. We also had some suspicious people hanging around.
The ending was jaw-dropping - no idea what is gonna happen now! Absolutely suspesenful - I can't wait for the continuation!