It may not get as much discussion as it did seventy years ago when it first premiered, but 'Les Diaboliques' (or as it was known in America, 'Diabolique') is one of the most profoundly influential thrillers in cinematic history. So let's dig in for a discussion of the plot twist you've probably seen a dozen times the way it was done originally, by Hitchcock's French rival Henri-Georges Clouzot, and discuss a classic tale of the perfect crime gone wrong.