This episode's headline: Hijacked; Bitter Harvest; Summit Trek. The guests include In Washington: ALAN HART, Journalist; EDWARD LUTTWAK, Georgetown University; JEREMY LEVIN, Former Hostage; In New York: NORMAN PODHORETZ, Editor, Commentary Magazine; Reports from NewsHour Correspondents: ROD STEVENS (Visnews), in Naples, Italy; JIM FISHER (Kansas City Times), in Kirksville, Missouri; LYNNE JOINER, on Mount Elbrus, USSR. Byline: In New York: ROBERT MacNEIL, Executive Editor; In Washington: JIM LEHRER, Associate Editor