This episode's headline: Police Story; Checks and Balances; Coming Apart. The guests include ED BAUMEISTER, Trenton [NJ] Times; LEE CULLUM, Dallas Morning News; CYNTHIA TUCKER, Atlanta Constitution; GERALD WARREN, San Diego Union-Tribune; IRWIN KNOLL, The Progressive; CORRESPONDENTS: JEFFREY KAYE; LIZ DONNELLY. Byline: In New York: ROBERT MacNeil; In Washington: JAMES LEHRER