Alan Turing is shown running in various scenes. It's never mentioned in the film, but he was a world-class distance runner. In 1946 he ran a marathon in 2:46:03.
On November 27, 2014, ahead of the film's US release, The New York Times reprinted the original 1942 crossword puzzle from The Daily Telegraph used to recruit code breakers at Bletchley Park during World War II. Entrants who solved the puzzle could mail in their results for a chance to win a trip for two to London and a tour of the famous Bletchley Park facilities.
Winston Churchill is supposed to have said that the Bletchley Park code-breakers "were the geese that laid the golden eggs", implying that they had made the one of the greatest contributions to victory over the Nazis.
Benedict Cumberbatch confessed that in one of the final scenes of the film, he couldn't stop crying and had a breakdown. It was, as he said, "Being an actor or a person that had grown incredibly fond of the character and thinking what he had suffered and how that had affected him."
In an interview with USA Today, Benedict Cumberbatch said of Turing's Royal Pardon, "The only person who should be pardoning anybody is him (Turing). Hopefully, the film will bring to the fore what an extraordinary human being he was and how appalling (his treatment by the government was). It's a really shameful, disgraceful part of our history."