 My first reaction is, you've done a good thing, stop. Don't do any more. But, I mean, then I think of the great trilogies, like Kieslowski's Three Colours, Red, White, Blue, which is so beautiful. And then, if you want to go even further, you get on to the Decalogue. And the way people come back, the way characters interlock and come back, it's like a jigsaw puzzle. He's a genius. If only he could have gone on making more.