I just finished watching the 'Beast from 20,000 Fathoms' and couldn't help but thank the opening narration is a little cheesy, but that's part of its charm. The sci-fi movies of the 50's made frequent use of an opening narration. Because so much exposition can be done quickly this way, it must have saved a bunch of money. But what are the movies that were great, in part at least, because of a narration, either opening or otherwise? The one that comes to mind for me is 'Sunset Boulevard.' That great sardonic narraton by William Holden was on the dot, at least for me.