In the spring of 1945, Allied film units followed British and American troops into Bergen-Belsen, Dachau, and other newly liberated camps, and this footage, shot on the orders of Sidney Bernstein for Britain's Ministry of Information, is what they brought back. Alfred Hitchcock advised on the editing, insisting on wide shots and unbroken pans specifically so that skeptics could never claim the horror was staged or cropped for effect. The camera holds on mass graves being filled by bulldozer, on survivors too weak to stand, and on German civilians marched through the camps to view what had been done a few miles from their homes. Shelved by the British government for decades over concerns about postwar politics, the film finally reached broadcast on PBS's Frontline in 1985, narrated by Trevor Howard, with one reel still missing. There is no score and little commentary beyond captions naming each camp and date. The footage is the argument, presented as evidence rather than as history already settled and explained.