SUNDAY'S MUST-SEE

"Knight Rider," 8 p.m., NBC. Let's credit NBC for trying to inject high-octane action. We can't guarantee "Knight Rider" will be good, but it will be pretty. It has a handsome war veteran, an attractive grad student and a gorgeous car. All are smart, especially the car. It talks, urging the humans to save its creator. It also morphs and jumps and more.

SUNDAY'S MIGHT-SKIP

"Dexter," 9 p.m., CBS. Since childhood, Dexter (Michael C. Hall) has had the instincts of a serial killer. Now he channels them; he kills killers, tortures torturers. This is a Showtime series that is moving to CBS (which is toning down the tortures) to fill a gap created by the strike. In fairness, "Dexter" is smartly written and beautifully filmed. In a new Television Week poll, critics picked it as the third-best show on TV. We'll dissent. We consider the lead character a blank automaton and the show dark, distant and uninvolving.

OF NOTE

"American Gladiators," 6 p.m., NBC. The eight-week tournament wraps up. One man and one woman will each win $100,000 and become a gladiator next season.

"Extreme Makeover: Home Edition," 7 p.m., ABC. This focuses on a boy who is blind and disabled. The team remodels his house to help him follow his goal of becoming a musician and a leader.

"Nature: Arctic Bears," 7 p.m., PBS. Polar and grizzly bears have mastered different terrains. Now the shrinking of the polar ice cap may doom one, while the other thrives. This hour illustrates that with gorgeous photography.

"The Wire," 7 and 8:30 p.m., HBO. McNulty's scheme — creating a fake killer to get extra funding — is spinning out of control. This is becoming a fascinating tale.

"Brothers and Sisters," 9 p.m., ABC. In a new episode — the last one available for now — Nora (Sally Field) begins to have second thoughts about Isaac (Danny Glover).

"Breaking Bad," 8 and 9 a.m., AMC. Walt had been careful not to tell his wife that he's dying of cancer, making meth and he has killed two people. Under pressure, he finally tells her - but only the first part. It's another great hour.