We made our Moriarty very different to [Conan] Doyle's. He's Irish, and he brings all his charm, his twinkle and his humor to it while he's also terrifying.

It's a cliche, but it's true that all the fun lies in baddies, grotesques and comic roles.

One man's fish is another man's poisson.

I imagine John Watson thinks love’s a mystery to me, but the chemistry is incredibly simple and very destructive. When we first met, you told me that a disguise is always a self portrait, how true of you, the combination to your safe – your measurements. But this is far more intimate. This is your heart, and you should never let it rule your head. You could have chosen any random number and walked out of here today with everything you worked for. But you just couldn’t resist it, could you? I’ve always assumed that love is a dangerous disadvantage. Thank you for the final proof.

That's what makes characters interesting. If Sherlock [Holmes] had started out being a straightforward man, we wouldn't be talking about him now. If he became one, that would be interesting. But you have to give him somewhere to go, as [Conan] Doyle did.

Even when I was a child, I always wanted to be older. I realised just in time that it's a mistake and to enjoy my youth while I had it.

They are called 'Emos' now, and before that they were 'Goths.' They didn't have a name for it when I was one, but I was that black-wearing teenager and yes, I wore a little eyeliner.