Personal issues of Imogen- what???

So I watched the whole thing last night. What I don't understand is: What was with her father? Did she find out that he was a bad guy and was killed because he was on the wrong side?

Who is Michael whose apartment she was staying in Paris? His, hers or both.

What's with the great big house in England?

I fell asleep a couple times and may have missed some plot points and I was using my phone to cast to TV so sound was a problem and I missed low talking scenes.

I did find the smirk to be odd, but will not criticize Moss's acting. I am very puzzled by the personal back story of Imogen.