Three stylish adaptations of Agatha Christie mysteries, with deft plots, charming settings, and stellar casts. Includes Sparkling Cyanide, in which a businessman's wife is poisoned at a nightclub; Why Didn't They Ask Evans?, a tale of murder and false identities; and Seven Dials Mystery, in which a fun weekend party turns funereal. With Sir John Gielgud, Francesca Annis, Pauline Collins, and Susan Hampshire. About 7 hrs, 3 DVDs, SDH.