To mark the 72nd anniversary of the Great Escape, Yesterday is showing this fascinating one-off documentary which examines one of history's most compelling stories.
At the height of the Second World War on the night of 24th March, 1944, 76 brave Allied airmen escaped from the North Compound of Stalag Luft III, a supposedly 'escape-proof' prisoner of war camp deep in Nazi territory, in what is now western Poland.
This was the 'Great Escape', one of the most iconic and thrilling stories in military history. Hear how this true story was carried out, leading to it being immortalised in Steve McQueen's Hollywood blockbuster film of the same name. Let's just say there wasn't any jumping over fences on motorbikes, for a start.
We follow a crack team of engineers and archaeologists as they join forces with some of the prisoner of war camp's original survivors, to unearth, for the first time, the secrets of the most famous wartime escape in military history. Will they find evidence of the tunnelling activity in the precarious terrain?