[Season 4 of Sherlock Holmes will be] myopically dark. You're talking about the end of the universe darkness. You can't see in front of you and would walk into everything dark.

If you have an over-preoccupation with perception and trying to please people's expectations, then you can go mad.

We have a lot more unlikely heroes now. It’s not just the guy with guns—it’s the guy with brains.

I tend to have a cup of tea, try to stop worrying about what I did wrong, cool down and will the audience back in as soon as possible.

When I was young I became kind of a party animal. I had a massive crash. My health suffered. I was just overdoing it. That person could not be further from the one who emerged from that earlier experience. I regressed massively.

I love doing impersonations of people.

I drag a lot of stuff round with me that I don't need.