The fall season begins on the Fox network tonight, with new episodes of "Martin," "Cops" and "America's Most Wanted" and the debut of the series "The Preston Episodes." On cable, Gary Sinise steps into the persona of the 33rd president of these United States.
* "U.S. Open Tennis" (11 a.m.-7 p.m., WJZ, Channel 13) -- On "Super Saturday," the women's singles final and the men's singles semifinals take center court from the National Tennis Center in Flushing, N.Y. CBS.
* "Xena: Warrior Princess" (4 p.m.-5 p.m., WBFF, Channel 45) -- A syndicated spinoff from "Hercules: The Legendary Journeys," this series stars Lucy Lawless as the warrior first seen as a deadly adversary of Hercules. In the first episode she gains a sidekick, Gabrielle (Rene O'Connor), as she journeys to her homeland.
* "Martin" (8 p.m.-8:30 p.m., WBFF, Channel 45) -- In the season premiere, Martin (Martin Lawrence) unhappily finds himself being hustled in a pool hall. Fox.
* "The Preston Episodes" (8:30 p.m.-9 p.m., WBFF, Channel 45) -- David Alan Grier, a versatile regular on "In Living Color," takes the starring role in this new series, portraying a divorced college professor who sets out to make a career as a writer. Fox.
* "TV's Funniest Families II: The Kids" (10 p.m.-11 p.m., WBAL, Channel 11) -- A repeat from the spring, with hosts Alan Thicke ("Hope & Gloria") and Tatyana M. Ali ("The Fresh Prince of Bel-Air"), the show offers memorable scenes from series
featuring family humor. NBC.
* "Fox Preview Special" (11 p.m.-midnight, WBFF, Channel 45) -- The rest of the Fox lineup premieres next week, so this promotional hour with David Alan Grier sets up the cliff-hangers to be resolved on "Melrose Place," "Beverly Hills, 90210" and "The Simpsons." Fox.
* "Truman" (8 p.m.-10:30 p.m., HBO) -- Hot actor Gary Sinise ("Forrest Gump," "Apollo 13") says he devoured David McCullough's biography and studied old film clips to get into the role of Missouri-born populist Harry S. Truman, who assumed the presidency upon the death of Franklin Delano Roosevelt in 1945. This film premiering tonight, adapted from the Pulitzer Prize-winning McCullough book, co-stars Diana Scarwid (as Bess Truman), Tony Goldwyn, Daniel Von Bargen, Richard Dysart and Pat Hingle.
* "Biography: This Week" (8 p.m.-9 p.m., A&E; Network) -- A new Saturday edition of the nightly series, aimed at tackling the timeliest topics, premieres with "Lance Ito: Sitting In Judgment," a profile of the O. J. Simpson trial judge.