Oflag VI-B, Warburg, Germany: On the night of 30 August 1942 - 'Zero Night' - 40 officers from Britain, Australia, New Zealand and South Africa staged the most audacious mass escape of the Second World War. It was the first 'Great Escape' - but instead of tunnelling, the escapers boldly went over the huge perimeter fences using wooden scaling contraptions. Months of meticulous planning and secret training hung in the balance during three minutes of mayhem as prisoners charged the camp's double perimeter fences. In telling this remarkable story, historian Mark Felton brilliantly evokes the suspense of the escape itself and the adventures of those who eluded the Germans, as well as the courage of the civilians who risked their lives to help them in enemy territory.