For two months in 1944, the men, women and children of Warsaw faced incredible odds in a bid to liberate the Polish city from Nazi occupation. They did so alone, even though Soviet forces arrived on the scene at the height of the conflict. Told through the personal accounts of those who took part, Timewatch investigates why the Red Army failed to join the uprising as it tells the little-known story behind one of history's greatest betrayals. 3/6.