To be on set with Tom Hiddlestone and Hugh Laurie is just fantastic. But during 'Homeland,' I was on set with Claire Danes and Damian Lewis, so I'm used to working with big hitters.

As an actor, whether I'm playing Othello on stage or David Estes on 'Homeland,' that ability to give into your imagination is something that I enjoy.

Working with Olivia Colman has probably been the highlight of my career so far.

I'm very, very used to feeling anonymous, you know?

I've been acting for 27 years, and anonymity has always been a part of what I do. Of course you get recognised every now and again, but 'Homeland' pushed me into a completely different strata, and that took me by surprise.

When I was sent the script for 'Homeland,' I didn't think anything of it. Three months later, my manager rang and said: 'They are interested in you.' I read it and I realised, 'Yes, I do want this.' Then I got an email saying I'd got it.