We tend to damn Woody Allen’s lighter comedies as ‘just’ comedies: if anyone else had come up with this 1993 nugget, we’d acclaim it as a pearl. Allen and Diane Keaton-telepathic together again?are paranoid that the woman next door’s been bumped off; Alan Alda and Anjelica Houston stir the confusion. A wholesome whodunnit, but, chiefly, a hoot.