- You may be looking for the novel.
According to the Eighth Doctor, demontage was a French word which meant the opposite of montage. As he told Sam Jones and Fitz Kreiner, it implied the deconstruction of an event or person to get to some core truth. While a montage was a collage of pictures which formed a complex image, a demontage stripped away the complexity to arrive at simpler truths. In particular, the Doctor wanted to demontage Henri Blanc, so as to figure out his motivations. (PROSE: Demontage)