For the week starting Friday, Dec. 23. Times are E.S.T., subject to change.
Screen Directors' Playhouse (Fri. 10 p.m., NBC). Edmund Gwenn in Miracle on 34th Street.
Metropolitan Opera (Sat. 2 p.m., ABC). Donizetti's L'Elisir d'Amore, with Bidu Sayao and Ferruccio Tagliavini.
White House Christmas Tree (Sat. 5 p.m., all networks). President Truman lights the Christmas tree in Washington by remote control from Independence, Mo.
CARE Salute (Sat. 5:30 p.m., CBS). Guests: Charles Boyer, Danny Kaye, Francis Lederer.
NBC Symphony (Sat. 6:30 p.m., NBC). Guest conductor: Guido Cantelli.
Midnight Mass (Sat. 11:45 p.m., NBC-TV). From St. Patrick's Cathedral. Celebrant: Francis Cardinal Spellman.
Pope Pius XII (Sun. 2 p.m.,...