I think sometimes we look at other people's marriages and we think they must always be so happy together. I don't know anybody who's married for a long time who hasn't somehow made room in their love story for the hate and resentment that they sometimes feel toward each other.
To create characters, one must build background. And one of the tools we use is improvisation.
I think the risks that people see of terrorism are incredibly important but we are very confident we have got the right people on it and the risks have been minimised.

