TODAY'S MUST-SEE

Super Bowl, kick-off about 1 p.m., NBC. Here's a classic match-up, a battle of opposites. The Pittsburgh Steelers have the best defense in pro football; the Arizona Cardinals have one of the best offenses. The Steelers are old hands at this; they won three years ago, their record-tying fifth Super Bowl title. One of the stars of that team, Jerome Bettis, is now in the NBC pre-game crew; another, quarterback Ben Roethlisberger, will be back on the field. The Cardinals have never been to the Super Bowl — but their quarterback, Kurt Warner, has. Both teams are vulnerable — the Steelers lost four times this year, the Cardinals seven times. It could be a good one.

TONIGHT'S MUST-SEE

"The Office," 9 p.m., NBC. This show has drawn praise and an Emmy for best comedy series. It has not, however, drawn an especially large audience. Now it gets its chance, airing right after the Super Bowl on the Mainland. It will expand to an hour and go beyond its usual dry, droll approach. That's expected to included a big moment early, when Dwight's safety-preparedness talk becomes (extremely) mandatory. Later, there's a roast of Michael (Steve Carell). The highlight, however, could be a pretend movie that the characters are downloading at the office. The film is a six-minute parody, starring Jack Black, Jessica Alba and Cloris Leachman.

OF NOTE

"I Love Lucy" marathon, 6:30 a.m., Hallmark Channel. Settle in for a full day of one of the great comedies in TV history.

Super Bowl previews, 7 a.m., NBC. That starts with the annual "Road to the Super Bowl" film. Afterward, NBC will preview the game from 8 a.m-1 p.m.

Super Bowl music, NBC. Before the kick-off, Faith Hill will sing "America the Beautiful" and Jennifer Hudson will sing the National Anthem. At halftime, Bruce Springsteen takes over.

"Hole in the Wall," 7 p.m., Fox; 0r "Wipeout," noon, 7 and 8 p.m., ABC. Other networks won't push too hard to compete with the game. In this case, viewers can catch hours of game-show goofiness.

"Puppy Bowl," 1 p.m., Animal Planet; reruns at 3, 5, 7, 9 and 11. Yes, it's two hours of cute puppies. That's sort of the opposite of watching menacing linebackers.

"Cold Case," 7 p.m., CBS. In a change of plans, this show is moving up an hour earlier than usual and rerunning an episode about the murder of a deaf boy. That leaves room to rerun the season opener of "The Unit" (a massive assassination plot) at 9 and rerun "The Mentalist" (Patrick Jane's former psychiatrist is a murder suspect) at 10.

"Groundhog Day" (1993), 4 p.m., WGN; or "The Devil Wears Prada" (2006), 5:30 p.m., FX. Here are the best of the movie alternatives. "Groundhog" has Bill Murray and an elaborate plot about a day that keeps being repeated; "Prada" is a sleek drama-comedy, with Meryl Streep perfect as the commanding boss.

"Big Love," 7 and 8:35 p.m., HBO. This is a huge episode on a broad level — Roman's trial is nearing, with witnesses dropping out — and on a personal level for Bill's family. There are shell-shocks throughout; it's a well-made show, but a tough one for casual viewers to catch up with.

"Flight of the Conchords," 8:05 p.m., HBO. Bret has a song — a bad one — that manages to insult all rappers. Now he decides he must start a gang, in a sometimes-hilarious episode.

"The Secret Diary of a Call Girl," 8 and 10:30 p.m., Showtime. This series has been so-so, but here's an above-average episode. Belle suddenly sees the aftershocks of her work, when a client's wife confronts her.