No one can rightfully claim that Hush . . . Hush Sweet Charlotte is dull. The unrestrained acting performances alone -- or the caricatures that substitute for acting performances here -- are just too much fun to watch. This is the kind of film, in fact, where Agnes Moorehead makes Bette Davis appear downright restrained in comparison. Or where Joseph Cotten and Mary Astor's mint julep accents flow as thick and gooey as molasses. Hush . . . Hush, which owes a great deal to the French classic Diabolique (1954), does cheat the viewer on occasion but Robert Aldrich's direction is so over the top that few will probably question a scene where a murdered Cotten -- well, that may be giving too much away. Suffice it to say, the story doesn't quite make sense but what other movie would dare chop off Bruce Dern's head even before the opening credits?