TONIGHT'S MUST-SEE

"Brat Camp," 7 and 8 p.m., ABC. This reality show is a ratings hit and will be back. Tonight, however, is the finale for this batch of troubled teens, after a rerun in which the campers worry about which ones will be able to go home for Christmas. In the finale, with some campers gone, the others face fresh challenges during the holidays.

"American Masters: Ralph Ellison: An American Journey," 9 p.m., PBS. Ralph Waldo Ellison was named after Ralph Waldo Emerson, by parents who savored literature. His father had a fatal accident at work when Ralph was little. His mom worked as a maid, shuffling the family from apartment to apartment. She saved Vanity Fair magazines from her employers' homes. The boy studied their look and tone; he became a musician and then a novelist. In 1953, his "Invisible Man" won the National Book Award, a first for a black author. Here's a rerun of a superb 2002 documentary, with re-created "Invisible Man" scenes and a reading by Toni Morrison.

OF NOTE

"So You Think You Can Dance," 7 p.m., Fox. A 90-minute episode of the reality show, with 14 contestants left.

"Can't Buy Me Love" (1987), 8 p.m., ABC Family. Nowadays, Patrick Dempsey is considered a TV hunk on "Grey's Anatomy." Back when this pleasant movie came out, however, he was 21 and quite convincing as a nerdy chap who hires a cheerleader to pretend to be his girlfriend.

"Rock Star: INXS," 8 p.m., CBS. It's time to cut another singer.

"King of Queens," 8:30 p.m., CBS. Doug and Carrie decide they need to find new friends.

"The Bernie Mac Show," 8:30 p.m., Fox. In a funny rerun, Bernie goes high tech to spy on his wife.

"Kicked Out" debut, 10 p.m., ABC Family. In this reality show, we're supposed to sympathize with parents who oust their 24-year-old "slacker" son, who'll be leaving a near-mansion for a 10-day reality check. The whole thing seems contrived both in its problems and its solutions.