Good for you! I got 93%.
I guessed on the magician question (I don't remember there being one in the first episode of series 3) and the Lucky Cat question.
A lot of the questions were easy, but those two were asking about things I didn't remember at all.
I was pretty sure that Amanda and Martin weren't actually married, but I also clicked "yes" that they were because I had a feeling there was a mistake in the question (or the person writing the quiz didn't realize that while they were a couple they weren't actually married). 

I had forgotten about the "just ten pounds" thing, and I think I just didn't know about Darren Brown or him being in the episode. 

Oh, that guy. I guess I just assumed he was some background actor. Didn't know he was famous in any way.

He does do hypnotism type acts, but also quite elaborate setups where somebody is supposedly led to believe something that isn't true - some of his scenarios are quite disturbing.  So as well as being a friend, I think he was a fun choice to have in Anderson's version - Sherlock's fall was a step too far, but still along the lines of something he might do!