All these portrayals we see of knights fighting must be absolute rubbish because knights in armour could literally have only had two or three blows and then they'd have had to sit down to have a cup of tea.

I think it serves the purpose of the film if the premise is that you're unsure of me because you've only ever really seen me play villains.

The idea of transformation - playing something I'm not - is the bit I enjoy most about acting.

When you're making a psychological thriller, what you need to do is have an audience on shifting sand so they're never quite sure where they are.

Part of me was fascinated by the idea that I would only get next week's episode a week in advance and wouldn't actually know where I was going with it, until the script landed on my mat. But, part of me wanted to know what was going to happen.

I'm not a writer, inherently. Most of the writers I've met have stories they need to tell. I don't have that. I'm an interpreter. I like getting a script, seeing a character and thinking, "Oh, wow, I know what I can do with that."

I just invited close friends and family, the usual suspects whose opinion I value but who I know will enjoy the film [Before I Go To Sleep]. I don't know how difficult it is for them to suspend their disbelief because they obviously know me and what they're seeing is not me.