[Toby Jones] is completely different. It's a completely different character. He's the darkest villain we've had. There was always something charming and engaging about Moriarty. There was something fascinating and actually amoral, rather than immoral, about Charles Augustus Magnussen. This guy is the purest evil. Sherlock [Holmes] is actually appalled by him.

It was all quite ghastly and I was very fond of it.

I love going to galleries, particularly the National Portrait Gallery.

I'm terribly nostalgic, but I'm with the Elizabethans who thought nostalgia was a disease. It's a dangerous place to be because you can get caught up in it.

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.

I prefer sneaking in the back door.

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.