You can't really go wrong with David Lean adapting Noël Coward in a film about poor old Rex Harrison ("Charles") and three on-form women: two of whom he married - Constance Cummings ("Ruth)" and Kay Hammond ("Elvira") and the other is the source of most of his woes - spiritual medium Margaret Rutherford ("Madama Arcati"). Right from the start, the pace of the dialogue is witty and engaging. Harrison - who can be terribly wooden on occasion, is well up for this spiritual lark as a seance at his home - under the supervision of the dotty Rutherford - releases his former wife "Elvira" back into…