ln 1942 through an horrific process of trial and error these Nazis created something entirely new in History - killing factories capable of murdering millions. With the increase in killing at Auschwitz and nearby Treblinka, people are showing tremendous courage, like German officer Albert Battel risking his life to save detainees.

The fifth episode explores how the deportation of Hungary's Jews in 1944 precipitated the most intensive slaughter in Auschwitz's history.

Last in series about the Nazi concentration camp looks at the fate of the remaining prisoners and their guards. Uncovers how many survivors faced appalling treatment in their home countries and how many guards escaped justice.

Hitler’s rise to power was a unique moment in history. Germany suffered a humiliating defeat in WWI; now it's crippled by massive war reparations. Hitler offers a scapegoat: the Jews. The Nazis are quick to institute anti-Semitic laws and stoke distrust of the Jews. Anyone deemed 'undesirable,' from political opponents, to the handicapped, gypsies and Jews are sent to camps. There they are either worked to death, starved or executed. But just how much did the rest of the world know of what was going on?

Researchers discover film footage from World War II that turns out to be a lost documentary shot by Alfred Hitchcock and Sidney Bernstein in 1945 about German concentration camps liberated by allied troops. When Allied forces liberated the Nazi concentration camps in 1944-45, their terrible discoveries were recorded by army and newsreel cameramen, revealing for the first time the full horror of what had happened. Making use of British, Soviet and American footage, the Ministry of Information’s Sidney Bernstein (later founder of Granada Television) aimed to create a documentary that would provide lasting, undeniable evidence of the Nazis’ unspeakable crimes. He commissioned a wealth of British talent, including editor Stewart McAllister, writer and future cabinet minister Richard Crossman – and, as treatment advisor, his friend Alfred Hitchcock. Yet, despite initial support from the British and US Governments, the film was shelved, and only now, 70 years on, has it been restored and completed by Imperial War Museums. This eloquent, lucid documentary by André Singer (executive producer of the award-winning The Act of Killing) tells the extraordinary story of the filming of the camps and the fate of Bernstein’s project, using original archive footage and eyewitness testimonies.

Originally a Prisoner of War camp for Soviet soldiers, SS Commander Rudolf Hoss oversaw the transition of Auschwitz from a political camp to a place to murder thousands of people. In the Autumn of 1941,the Nazis were about to embark on the most crucial few months in the planning of what they called 'The Final Solution' - the extermination of the Jews.