On The Weekend Watch:
AN APPLE A DAY -- Here's a nicely informative bit of back-to-school month programming. Maryland Public Television is running at 8 p.m. tonight (and every Thursday in September) the PBS science education series "Newton's Apple" (at 8 o'clock). While aimed at teens, the show is often a fascinating experience for adults, too. Wouldn't you like to know how helicopters fly? And why they call it a koala bear when it's really a marsupial? Both are among tonight's scheduled topics to be answered by personable host David Heil.
PREMIERES, PREMIERES -- Next week marks the real rush of new programs for the fall season, but several shows do make their first appearances in the coming days. At 9 p.m. Friday on Fox (Channel 45) comes "The Ultimate Challenge." It's from the producers of "American Gladiators," and offers a wide range of ++ death-defying derring-do. On Saturday on NBC (9:30 p.m., Channel 2) is "Nurses," a new ensemble comedy/drama whose cast includes Johns Hopkins alumnus and comic Jeff Altman. Also Saturday is the new syndicated "WKRP In Cincinnati" (at 7:30 p.m., Channel 11). On Sunday, NBC offers three new series beginning at 7:30 p.m.: "Eerie, Indiana," "Man of the People" and "Pacific Station." The middle show offers the return to TV of James ("The Rockford Files") Garner. CBS also launches in movie-length form (at 9 p.m., Channel 11) the series "P.S. I Luv U," with Connie Sellecca and Greg Evigan (regularly airing on Saturdays).