One of the saddest things I've ever done is download 'I'm A Teenage Dirtbag' by Wheatus and play along with it with my headphones on. Oh, God. If you were to walk in and see me do that, you would really worry for me.

I enjoyed learning French, and I enjoyed speaking French.

As a committed Whovian, I cannot believe my luck in joining the Twelfth Doctor for one of his inaugural adventures. My only worry is that they'll make me leave the set when I'm not filming.

Death In Paradise' is my dream job - a fascinating character, great scripts, superb cast, and shooting in the Caribbean with French catering.

I chose to deal with the science of cryptography. Cryptography began in mathematics. Codes were developed, even from Caesar's time, based on number theory and mathematical principles. I decided to use those principles and designed a work that is encoded.

No delusion is greater than the notion that method and industry can make up for lack of mother-wit, either in science or in practical life.

There'll always be serendipity involved in discovery.

I've turned arrogance into an artform, where it's so absurd that it becomes comedy. But I've never done anything to hurt anybody or steal from anyone.