Unlike the first few filmsin the Potter franchise,the sixth instalmentdoesn't have a completestory of its own: it's reallyjust a small piece ofa large jigsaw. It's stilla colourful piece, mindyou. There's no doubtingthe quality of thewondrous productiondesign, the magicalspecial effects, and thehamming theatricalgrandees. But thatdoesn't make up for thelack of plot. The identityof the mysterious "Half-Blood Prince" is an irrelevance– and so is almosteverything else.