Inspired by another successful escape in a neighboring compound, Stalag Luft III escape mastermind Roger Bushell and the X Committee reopen a second escape tunnel nicknamed Harry, as teams begin assembling costumes and forging documents. When the escape finally goes ahead, 200 men assemble in Hut 104 but are met with a series of problems to overcome and a constant danger of being discovered. Once out of the camp with only a few rations and their own two feet, over 600 miles of occupied land and sea lay between the POWs and Allied Britain.