Parker Pyne (Maurice Denham) delves into "The Case of the Middle-Aged Wife," a woman who tries to regain the attention of a husband with wandering eyes. With Gwen Watford, Peter Jones. Can a man forever hold his peace "In a Glass Darkly" when he knows an engaged man will one day murder his wife? Nicholas Clay, Emma Piper star. "The Girl in the Train" recruits a man (Osmund Bullock) who takes possession of a mysterious package. With Roy Kinnear, Sarah Berger. A train passenger relates a scary story about a dying dancer, in "The Fourth Man." John Nettles, Michael Gough star. In "The Case of the Discontented Soldier," Pyne (Denham) helps a retired military man find love. With Patricia Garwood, William Gaunt. 4 1/3 hrs. total on two discs. Standard; Soundtrack: English Dolby Digital stereo; Subtitles: English (SDH); biographies.