People like Tywin Lannister are very much victims of that system, and of that environment: 'This is my place, don't threaten it'. I don't know how relevant that is to today. Politics is the most corrupt profession on earth, no matter where you are.

I spent a lot of time [between takes] apologising to Peter Dinklage [Dance's on-screen son, Tyrion Lannister] because I treat him appallingly.

It starts with the writing - which is really, really good. And the production values are phenomenal. HBO and Sky have spent money on it, and you get what you pay for. This has money put into it properly - not lavish amounts - but as each season is successful, they maintain the money that's being spent to maintain the quality.

But the quality of writing in the series [game of Thrones] is paramount. That's probably why all of us are involved in this and all of us are quite so loyal to it, because we don't have to expend a lot of energy trying to make a silk purse out of a pig's ear. The quality of the writing is really good, and that's what makes playing a character so enjoyable, whether he's heroic or villainous.

You have to be selfish to be an actor.

I have to admit that I haven't read any of the books [of George Martin's "Game of Thrones"] and I don't refer to them. Apart from anything else they're very thick [in size] and they frighten me. A terrifying prospect.

You have to attempt to be objective about yourself.