I wanted to run for this particular children’s charity, one of the biggest charities in the UK, called Barnardo’s. It was something I always kind of wanted to do and I was sort of egged on.
I was here in New York shooting Elementary with Jonny Lee Miller and he does a lot of marathon running and ultramarathon running. He was kind of like, ‘Just do it. Just do it!’ So I did.
I made the mistake, or had the advantage, of telling everyone that I was going to run it in under four hours. I made that promise in October but I did it. I did it in 3:50.