Just how did the team at Bletchley Park tackle the problem of decoding Enigma? In Part Two of our series on "The Real" Imitation Game, Professor Brailsford explains how they did it. Part One of this series: Turing's Enigma Problem: Professor Brailsford's notes: Numberphile on Enigma: History of Undecidability: Mainframes and the Unix Revolution: Turing Machines Explained: EXTRA BITS - Banburismus Secret: This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: Computerphile is a sister project to Brady Haran's Numberphile. See the full list of Brady's video projects at: