EXCALIBUR is a grand, clanky, brooding fantasy following Arthurian legend from the young king's anonymous background to his rise as ruler of ancient Britain. Nigel Terry is excellent as a naive, altruistic Arthur; Nicol Williamson camps it up amusingly as Merlin; Guenevere (Cherie Lunghi) and Lancelot (Nicholas Clay) provide a couple of steamy moments. Excessive but occasionally inspired, EXCALIBUR gives us grimy lumbering knights, gloomy castles, slithering dragons, mesmerizing magic, and (of course) the struggle between good and evil. Excellent makeup and costuming, as well as convincingly rustic Irish location work. Williamson and Helen Mirren, who plays Morgana, ...