Sir Alfred Hitchcock was one of the first people permitted to film the concentration camps in Europe in 1945, right after the Auschwitz liberation. The footage showed horrifying images of walking skeletons, people barely alive walking amongst the thousands of starved and/or bloody corpses, and large mass graves with hardly recognizable bodies being quickly tossed in. You can view piles of cut hair, personal belongings, clothing, all stripped from the inmates. Hitchcock got the genuine glance of the deadly nightmare. Most people weren't ready to see such horrific sights, and the film was not publicly shown. But only in the past couple of years has the footage been found, and finally put on display on the seventieth anniversary of Auschwitz's liberation.
Walt Disney refused to allow Sir Alfred Hitchcock to film at Disneyland in the early 1960s, because Hitchcock had made "that disgusting movie, Psycho (1960)". Hitchcock's intended project is unidentified at this time, but it may have been for an episode of his television series.