My dad was quite a forbidding figure. I realise now that that was mainly because he worked so hard. He wasn't unkind, but he was a presence.

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.

All films speak to their times. It becomes obvious only after.

When I was seven or eight, I was bought a fantastic book called 'The Movie Treasury of Horror Movies' by Alan G. Frank; it became my bible. It's packed full of the most amazing photos and is still fantastic to look at.

I grew up with low self-esteem. I didn't think I was very pretty. I had glasses, red hair and was generally quite a spod.

When I was your age — about, ooh, a thousand years ago — I loved a good bedtime story. The Three Little Sontarans. The Emperor Dalek's New Clothes. Snow White and the Seven Keys to Doomsday, eh? All the classics.

The thing is, horror is a big part of 'Sherlock Holmes.' Doyle also wrote a lot of great horror stories, so there's a lot more horror in 'Holmes' that people possibly think of. There's a lot of curses and mysticism and real scares.