THURSDAY: An American Family. Second of 12 cinema-vrise documentary portraits of the William C. Loud family. Produced by Craig Gilbert, CH> 2. 9 p.m. Color. 60 min.

Verign 1968 Hitchcock film with Jimmy Stewart as acrophobia-ridden detective Scottie Ferguson. CH. 7. 9 p.m. Color. 2 hrs, 30 min.

FRIDAY: 1973 Inaugural Concert. Ormandy conducting the Philadelphia Orchestra, Van Cliburn, and the Robert Wagner Chorale perform Copland's "Fanfare for the Common Man," Beethoven's Fifth symphony, Grieg's Concerto is A Minor, and Tchaikovsky's "1812 Overture." A rare treat but don't watch unless Nixon signs the ceasefire agreement. CH. 2. 9 p.m. Color. Live.

SATURDAY: The Blue Angel. 1930 German classic with Marlene Dietrich and Emil Jennings. CH. 2. 8 p.m. B.W. 2 hrs. The Apartment. Jack Lemmon '47 in Billy Wilder's 1960 bittersweet comedy about corporate executive morals. Nominated for 10 Oscars, won 4. Lemmon's best. CH. 4. 8:30 p.m. B.W. 2 hrs. 30 min.

SUNDAY: The Caine Mutiny. Despite the teapot typhoons. Edward Dmytryk's 1954 sea drama is a powerful film with a devastating court martial climax. Humphrey, CH. 7. Noon. Color. 2 hrs. The Day the Earth Steed Still. Michael Rennie descends from an allen space rover to demand that Earth abandon nuclear testing in one of the early Sci.Fi greats. CH. 56. Noon. B-W. 2 hrs.

TUESDAY: The Incredible Flight of the Snow Greese. Filmed by naturalists Des and Jen Bartlett. CH. 4. 8 p.m. Color. 60 min.