Helen Hayes stars in a trio of Agatha Christie whodunits. The riveting adaptation of the author's "Easy to Kill," "Murder Is Easy" (1982), focuses on a string of murders that rocks a quiet English village and the visiting American computer expert who attempts to use technology to catch the killer. Bill Bixby, Olivia de Havilland, Lesley-Anne Down and Jonathan Pryce also star. A leisurely vacation turns into "A Caribbean Mystery" (1983) for septuagenarian sleuth Miss Jane Marple (Hayes) when she must solve the murder of a retired British army officer. Maurice Evans, Barnard Hughes, Swoosie Kurtz also star. And, Hayes is back as Miss Marple in "Murder with Mirrors" (1985), coming to the aid of an old friend (Bette Davis) who thinks someone is trying to kill her for her ancestral estate. Leo McKern, John Mills co-star. 4 3/4 hrs. total on three discs. Standard; Soundtrack: English.