Hitchcock's Holocaust
“In 1945, overseen by Alfred Hitchcock, a crack team of British film-makers went to Germany to document the horror of the concentration camps. Despite being hailed as a masterpiece, the film was never shown. Now, in a documentary called Night Will Fall, the full story of its creation and suppression is being told.”
"The Holocaust Film That Was Too Shocking to Show" - http://www.theguardian.com/film/2015/jan/09/holocaust-film-too-shocking-to-show-night-will-fall-alfred-hitchcock