* Tonight, a Democratic presidential debate on C-SPAN and MSNBC.

* Duke vs. Virginia in college basketball action on ESPN.

* Itzhak Perlman performs on "Live From Lincoln Center" on WETA.

Presidential Debate

Live from the University of New Hampshire, a debate between Vice President Gore and former senator Bill Bradley moderated by ABC News's Peter Jennings (C-SPAN and MSNBC at 7 p.m. and repeated on Channel 26 at 11 p.m.). ABC's "Nightline" will air extended portions of the debate at 11:35.

Public Broadcasting

Live From Lincoln Center. Violinist Itzhak Perlman performs with the Orpheus Chamber Orchestra and pianist Rohan DeSilva. 90 minutes (Channel 26 at 8).

Sports

NBA Basketball. Washington at Chicago (HTS, 8:30).

College Basketball. Duke at Virginia (ESPN at 9).

American Masters: Paul Taylor, Dancemaker (CC) chronicles a less-than-perfect year in the life of the choreographer and his troupe. 90 minutes (Channel 26, 9:30).

Series

Two Guys and a Girl (CC). In a wine-induced stupor, Sharon asks Ashley to be her bridesmaid (Channel 7 at 8).

it's like, you know . . . (CC). Shrug is the prime suspect when Robbie's mansion burns to the ground (Channel 7 at 8:30).

The West Wing (CC). The Prez calls for the assistance of a boozy British diplomat to help quell tensions between India and Pakistan (Channel 4 at 9).

Greed: The Multi-Million Dollar Challenge (CC). Night 1 of a consecutive three-night run of the game show hosted by Chuck Woolery (Channel 5 at 9).

The Drew Carey Show (CC). Drew stages a play promoting racial harmony (Channel 7 at 9).

Norm (CC). Laurie's sexy twin sister is evil, evil, evil, I tell ya! (Channel 7, 9:30).

Law & Order (CC). A school bully is suspected in a teenager's murder (Channel 4 at 10).

Special

TV Guide's Truth Behind the Sitcom Scandals 2 (CC). Everything you always wanted to know about the sitcoms "Diff'rent Strokes" and "Gilligan's Island" but were afraid to ask; includes interviews with series stars Todd Bridges, Gary Coleman, Bob Denver, Russell Johnson, Tina Louise and Dawn Wells. One hour (Channel 5 at 8).