'I'll never be the same again': facing family trauma in a Nazi concentration camp

Filmmaker Anthony Giacchino and producer Alice Doyard explain how a young history student persuaded Colette, 90, to visit the German concentration camp where her brother died

The new Guardian documentary, Colette, follows the remarkable story of a former member of the French resistance, as she travels to Germany for the first time to the Mittelbau-Dora concentration camp where her brother died 75 years ago. Persuaded to go on the journey by history student Lucie, 17, the pair support one another through an emotional journey into the past. When I cross into Germany I'll never be the same again," says Colette, 90.