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.