The BBC's lavish, glowingly designed adaptation of Mervyn Peake's eccentrically brilliant novels Titus Groan and Gormenghast is a triumph of casting. Ian Richardson's Lear-like depiction of the mad earl of a remote, vast, ritual-obsessed building is matched by the brutal pragmatism of Celia Imrie as his wife, the synchronized madness of Zoë Wanamaker and Lynsey Baxter as his twin sisters, and the duplicitous charm of Jonathan Rhys-Meyers as Steerpike, the kitchen-boy determined to take over no matter how many deaths it costs. John Sessions is surprisingly touching as Prunesquallor, the family doctor who realizes almost too late what Steerpike intends.

It is always tricky to film a book dear to the hearts of its admirers. Wilson and his design team achieve a look rather more pre-Raphaelite than Peake's own illustrations--shabby velvets, garish sunlight, and dank, stone passages. The score by Richard Rodney Bennett is full of attractive surprises--fanfares and waltzes and apotheoses--and John Tavener's choral additions are plausibly parts of the immemorial ritual of Gormenghast.

Since its publication at the end of World War II, Mervyn Peake's masterpiece, The Gormenghast Novels," has stood unchallenged as one of English literature's most extraordinary flight of imagination. Its themes of treachery, decay, madness and honor have come to be regarded as a metaphor for the fall of an empire, the passing of an age, and the rise of fascism.

The glorious castle of Gormenghast is home to the ancient family of Groan, where nothing has changed for thousands of years. The dynasty is threatened by the charming and evil kitchem-boy, Steerpike. With the birth of a new heir, Titus Groan, Steerpike begins his ruthless ascent to power. As he charms, outwits and terrorizes the castle's inhabitants, only the young and timid Earl of Groan, Titus, stands in Steerpike's way. Who will ultimately rule Gormenghast?