Presidential debate (6 p.m. CNN): GOP debate in Los Angeles.

America's Ballroom Challenge (7 p.m., Ch. 7): There's lots of great ballroom dancing by actual ballroom dancers — not a celebrity in sight.

College basketball: Women — Air Force at BYU (7 p.m., Ch. 11 and BYUTV); Men — Wyoming at Utah (8 p.m., The mtn.)

American Idol (7 p.m., Ch. 13): The auditions continue.

Crowned: The Mother of All Pageants (7 p.m., Ch. 30): Winners are declared in the season finale of this dumb but occasionally amusing reality/competition show.

NBA (7 p.m., FSN): Knicks at Jazz

Lost (8 and 9 p.m., Ch. 4): In preparation for Thursday's season premiere, the last couple of episodes from last season are repeated.

The Moment of Truth (8 p.m., Ch. 13): Last week, this show was just as smarmy and exploitative as it appeared — and it did huge ratings. Go figure.

Law & Order (9 p.m., Ch. 5): This episode is a take-off on Sen. Larry Craig's (R-Idaho) airport men's room incident.