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.

This BBC six-episode documentary film series presents the story of Auschwitz and the Holocaust through interviews with former inmates and guards and re-enactments. The first episode explores the beginnings of Auschwitz, and how the camp was originally intended for a purpose very different from that of the genocide of the Jews.

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.

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.

In late 1944, even as they faced imminent defeat, the Nazis expended enormous resources to kill or deport over 425,000 Jews during the 'cleansing' of Hungary. This Oscar-winning documentary, executive produced by Steven Spielberg, focuses on the plight of five Hungarian Jews who survived imprisonment in Auschwitz. Though these survivors recount the horrors they witnessed and endured as a result of the Nazis' 'Final Solution,' their individual triumphs are a testament to hope and humanity.