Though I really enjoyed watching this, it isn't really a film at all. Messrs. Powell and Pressburger have elicited the help of the supremely talented Christopher Challis and of the late Jacques Offenbach and basically filmed an augmented theatrical production of his eponymous, uncompleted, opera. They have assembled a curiously effective collection of gloriously clad acting talent - most of whom, aside from the narrator/composer himself in the form of Robert Rounseville, cannot actually sing - and proceeded to present us with something that is really quite beautiful to watch and listen to;…