As an actor, youre always nervous as to what a director will do with something.

Whatever mistakes you make this time around, you will live through on your next pass. Every mistake you make, you will live through again and again, forever. So my advice to you is to get it right this time around. Because this time is all you have.

It's a great thriller or mystery, but on another level it's a film about the fact that, if you only look at a person through one lens, or only believe what you're told, you can often miss the truth that is staring you in the face.

Whether its Veep or Homeland or The West Wing - which is a more idealised version of democracy - people are fascinated by politics.

Politics and acting are very closely tied. The job is to convince.

I was not a studious kid, and I struggled to find things that would command my attention and engage my ideas and energies.

London is a very energising place to be.