Rolling Stone has an article/interview with Benedict: Benedict Cumberbatch on Cracking 'Imitation Game''s Code.
[i'm ignoring the hysterical articles on the "colored" comment. If you watched the Tavis Smiley interview (which you can see here, it seems pretty obvious Benedict was going for "people of color", tried to combine it with "actor", and it came out wrong. Smiley didn't even blink, and he's not shy about these things.]