This guide is designed to alert readers to the scope and variety of programming coming up. Listing is not meant to represent blanket endorsement. Viewers are urged to be selective. SATURDAY Runaway Ralph - Part 2 (ABC, 12:30-1 p.m.): A mouse defends a boy against an unjust accusation in the finish of this two-part animated film based on the best-selling children's book by Beverly Cleary. Wonderworks (PBS, 8-9 p.m.): ``Necessary Parties,' premi`ering a new season of this popular series, tells about a boy who takes his divorce-bound parents to court, in the process teaching a lesson about marriage, commitment, and the selfishness of couples who place their own emotional needs above the family's. Raising Miranda (CBS, 8:30-9 p.m.): Season premi`ere of a sitcom about a father raising a teen-age daughter after her mother leaves the family ``to find herself.''
SUNDAY New York City Marathon (ABC, 10:30 a.m.-1:30 p.m.): It's America's largest field of marathoners in the 19th annual edition, covered live, of this classic race. Great Escape 2 - Part 1 (NBC, 9-11 p.m.): Christopher Reeve stars in the first part (``Sunday Night at the Movies'') of a two-episode dramatization of a sometimes grisly true story from World War II. It's about Allied POWs who escape from a German prison camp, then come back to find the killers of their fellow inmates. Second Annual Report of the Defense Secretaries (PBS, 10-11 p.m.): Nine former defense chiefs discuss compelling questions of how US defense policy can best be developed.
MONDAY Great Escape - Part 2 (NBC, 9-11 p.m.): ``Monday Night at the Movies'' concludes the two-part dramatization. Campaign: The Last Word (PBS, 10-11 p.m.): Some of public TV's leading reporters and commentators discuss the election-eve scene in a live special from Washington, hosted by Roger Mudd.
TUESDAY Election coverage (ABC, CBS, NBC, beginning 7 p.m., ET. Please check local listings for network and station coverage in your area): All the anchors, lots of commentators, and plenty of reporters in campaign headquarters and elsewhere will take part. Local stations also report on important races and ballot questions. The American Experience (PBS, 9-10 p.m.): ``Do You Mean There Are Still Real Cowboys?'' offers peeks at the old and new cowboy life styles, as seen from a Wyoming town.
WEDNESDAY Kristallnacht: The Journey From 1938 to 1988 (PBS, 9-10 p.m.): Eric Sevareid takes a look at one of the most tragic events in modern history - the Nazi-instigated assault against Jews and their homes, businesses, and synagogues in Germany.
Schedules may vary in some time zones. Please check local listings, especially for PBS, where individual stations often air programs on differing days and times.