We would not be here if we hadn’t got the two young leads right and, to some extent, got lucky. If you cast young leads in a big, Saturday night BBC show at that stage in their careers, you’re taking an enormous risk. Will they be able to carry it? We were lucky. We got it right. For me, it’s very hard for an audience to understand what an extraordinary job they’ve done. You look at Colin’s performance. It’s a seamless journey of growth, from a naive kid, to really quite a serious, dangerous man by the end of series four. And he’s paced that perfectly, and he’s done it with maturity. So I’m very proud of them and I’m not sure they really get the credit they deserve.