Its impossible to go onto the Tardis set and not play with things and fiddle with dials.

That's the thing about prep, is that it's a joy to have it there and you can spend all this time prepping, but ultimately you have to look at your script and turn up on the day. It's embedded in there somewhere but you have to forget it all and play the scene because we are storytelling.

There's not much TV these days where you really get that element of surprise. There are so many spoilers all the time.

The Gallifreyan balls are my favourite because you can juggle with them!

I am a restless person.

I used to dance a lot when I was younger. And I didn't want to stop doing it. I auditioned for drama school and then, luckily, I got my first job. There was never really a particular moment, more like moments of "I love this," or scripts that you read, or films that you watch, or plays that you see, that make you want to keep doing it.

I knew when I was 10 that I wanted to act full-time.