I had been a lifelong Alan Turing obsessive. Among incredibly nerdy teenagers, without a lot of friends, Alan Turing was always this luminary figure we'd all look up to.

I grew up with a lot of Muslim friends, and the whole idea of revelation has been a lifelong interest of mine.

I wish I had been home more when the children were growing up. I missed a lot.

A lot of biopics to me feel very much like someone is standing in front of the camera and is reading a Wikipedia page to you, like someone is reciting event. Did you know this happened? Did you know that happened? But Alan Turing's life deserved a sort of passionate film, and an exciting film.

'The Imitation Game' is a celebration of Alan Turing's life and legacy, and Joan's final monologue is our eulogy. It's the thing we all wished we could have said to him.

Telling Alan Turing's story in a two-hour film was a tremendous challenge. It felt in some small way like our filmmaking version of breaking the enigma code.