What persuaded one-time 'Man of the Year' Pierre Laval to send Jews to the death camps?

Polish Jew Chaim Rumkowski served as the Nazi-nominated head of the Lodz Ghetto during World War II, but his role in the Final Solution divided historians.

Archive footage, interviews and reconstruction help to piece together the stories of those who worked with the Nazis. Viktor Arajs formed a Latvian commando unit that hunted Jews.

Hard-hitting WWII series scrutinising the motives behind those who aided Germany's war-time effort. The Belgian Waffen-SS helped defend Berlin and safeguard the Eastern Front.

Uncovering the agendas behind the non-citizens of the Third Reich who nonetheless aided the Nazis. Croat Dinko Sakic ran an extermination camp in Axis-occupied Yugoslavia.

Lifting the lid on the individuals who did the unthinkable during WWII and colluded with the Nazis. The story of Vidkun Quisling, who declared himself 'Fuhrer' of occupied Norway.

The lesser-known stories of WWII. While the IRA never shared fascist ideology, a number of members traded intelligence with Abwehr as they sought an end to British rule in Ireland.

Historians are divided over Mohammad Amin al-Husayni, Grand Mufti of Jerusalem during WWII. While some say he was unfairly demonised, others point to his ties with fascist Europe.

Prominent collaborators Helmut Schmidt, Horst Geitner, Werner Goldberg and Helmut Wilberg all had a common trait - Jewish ancestry. What drove these individuals to aid the Nazis?

Shocking accounts of Nazi collusion. Staunch anti-Communist Ioannis Rallis, along with two predecessors, ran a Greek puppet government who were subordinate to their Nazi occupiers.

Shocking tales of Nazi collusion. Anton Mussert was one of the founders of the National Socialist Movement in the Netherlands and worked with the Gestapo.

Shocking accounts of Nazi collusion. Respected mathematician Rolf Nevanlinna led the Finnish SS against Stalin's Russia.

Shocking accounts of Nazi collusion. The Schutzmannschaft were the collaborationist auxiliary police forces of Nazi-occupied countries in Eastern Europe.