On 'Death In Paradise,' I had a CGI pet lizard and had to react to nothing, which was hideously embarrassing.
I'm afraid I'm very optimistic - and moralistic.
I love the basic comedy of growing a moustache.
I'd rather sink with a bad theory than swim with muddy pragmatism.
I'd probably be one of these terribly over-protective parents whose children become a neurotic wreck because they've never been exposed to real life.
I have always played a slightly ineffectual, bumbly, nice guy.
I like to think of myself as focused in work, but it probably comes across as obsessive.
Prostate cancer has taken a lot from me. First it took my grandfather and then my dad.
I'm not a 'suffer in silence' type; I'm a 'let's throw money at the problem' type - I've done reflexology, reiki, psychotherapy, counselling. I've never actually had analysis, but I'd like to try that sometime.
All men in their 40s want to be in rock bands, and I reserve the right to be in a pub band at some point.
It was only in the second year of my Ph.D. that I started acting. I wasn't in school plays or anything; I was in bands, but I wasn't cool. There's no such thing as a cool physics person, is there?
I studied physics at university, and I'm still a sucker for an experiment or scientific theory.
I live a pretty sedentary life, usually. I'm not an action man at all.
I'm not afraid to say it - I'm proud to be from a nation that wears its heart on its sleeve and isn't scared to show its feelings.
I did play a romantic part once - Orsino in 'Twelfth Night.'
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.
I'm always a bit wary when people say in interviews, 'I'm at the happiest place of my life that I've ever been.' I think, 'Really? Are you?' Life is a mix, isn't it?
I've been going bald since I was about 17. I'm still hanging on to my hair for dear life, but I do sometimes wonder - should I get a wig?
There's something wonderful about that sort of Poirot, Agatha Christie-style investigation: cross-questioning all the witnesses and checking their stories, looking for means, motive, and opportunity.
