Buffy has to face the economic facts of life without Mom on Buffy the Vampire Slayer (8 p.m., UPN). Lorelai has second thoughts about marriage, despite a wild bachelorette party, on Gilmore Girls (8 p.m., WB). On Undeclared (8:30 p.m., Fox), Steven tests fraternity life and Ron tries to stop Lloyd from making a conquest. The new drama series Smallville (9 p.m., WB) premieres. Tom Welling plays the teenage Clark Kent, a high school nerd with secret superpowers, a crush on Lana Lang and a bullying classmate named Lex Luthor. Mrs. Landingham lives! Kathryn Joosten guests on Scrubs (9:30 p.m., NBC) as a wise patient. Amy has to decide the fate of conjoined twins on Judging Amy (10 p.m., CBS).
NLCS, Game 1 (4 p.m., Fox)
David Letterman (CBS) Drew Barrymore
Jay Leno (NBC) Jet Li, Jill Hennessy
Politically Incorrect (ABC) Emmylou Harris, Jay Thomas
Conan O'Brien (NBC) Tom Cavanaugh
Craig Kilborn (CBS) Courtney Thorne-Smith
All times Eastern unless noted.