Cracking the Code
Thousands of people played BBC Two's The Code Challenge, fewer solved the 82 page puzzle book. The first three to do it were Pete Ryland, Helen Bennett and Dave McBryan who went head to head at Bletchley Park on the 10th September 2011. It was the final challenge against the clock to see who would win the prize.
Who would finally win after all those sleepless nights? All is now revealed.
Available since: Tue 27 Sep 2011
This clip is from
Marcus du Sautoy reveals the mysterious code which lies at the heart of our world