* This morning, a "Jetsons" marathon begins on the Cartoon Network.

* Tonight, Virginia plays in the MicronPC.com Bowl on TBS.

* The Wizards vs. the Knicks on WBDC.

* And a two-hour "48 Hours" previews the 21st century on WUSA.

Cartoon Marathon

The Jetsons Millennium Celebration. Beginning at 10 a.m. and right up to midnight tomorrow, the Cartoon Network will air every episode of "The Jetsons."

Sports

College Football. Humanitarian Bowl: Boise State vs. Louisville (ESPN2 at 3 p.m.); MicronPC.com Bowl: Virginia vs. Illinois (TBS at 7); Peach Bowl: Clemson vs. Mississippi State (ESPN, 7:30).

NBA Basketball. New York at Washington (Channel 50 at 7).

Special

CBS's Greatest Sports Moments (CC). Jim Nantz and Greg Gumbel look at sports highlights recorded by CBS cameras since 1947. One hour (Channel 9 at 8).

Public Broadcasting

Around Town (CC) reviews "The Idea of China in Japanese Art" at the Freer Gallery (Channel 26, 8:30).

Mystery! Heat of the Sun (CC). In Part 4 and the conclusion, Superintendent Tyburn arrests a newspaper magnate after the murder of a young boy employed by the tycoon. Two hours (Channel 26 at 9).

Prime-Time Movie

Wolf (1994) (CC) (R). Jack Nicholson plays a mean ol' wolf who has a hankering for Michelle Pfeiffer. Two hours (Channel 5 at 8).

Newsmagazine

48 Hours (CC) looks at the future of medicine, technology and lifestyles, and provides coverage of the first countdown to 2000 from Taveuni, Fiji (Channel 9 at 9).

20/20 Downtown (CC) interviews Gary Coleman and reports on suicide survivors (Channel 7 at 10).

Series

WWF Smackdown! (CC). Let's wrassle! (Channel 20 at 8).

ER (CC) (R). Drs. Greene and Weaver clash over the treatment of a critically ill teenager (Channel 4 at 10).

Late Night

The Tonight Show With Jay Leno (CC). With Arsenio Hall and Jimmy Buffett (Channel 4, 11:35).

Late Show With David Letterman (CC). With Dick Clark and 100-year-old pilot Ralph Charles (Channel 9, 11:35).

CAPTION: It's nonstop "Jetsons" from 10 a.m. till 2000 on the Cartoon Network.