TONIGHT'S MUST-SEE

"How I Met Your Mother," 8:31 p.m., CBS. Robin has an extreme phobia of shopping malls. The more she refuses to explain, the more her friends hunt for her secret. The answer is a surprise, and it's hilarious. With reruns like this, we're reminded that this is one of TV's best comedies.

"Kyle XY" season opener, 8 p.m., ABC Family. When this series opened last summer, the teen-looking Kyle was found naked in the woods with no memory and no navel. A warm psychologist brought him into her home and found he has an extraordinary mind. He left to seek answers about his roots. He finds them in this season opener. It's a fairly good episode that ends strongly. There's an explosive moment (literally) and a peek at a key new character.

OF NOTE

"Inside the Actors Studio," 5 p.m., Bravo. A week from now, TNT airs the superb season opener for Kyra Sedgwick's "The Closer." First, here's a good interview with Sedgwick. It starts with her blue-blood roots, then moves on to her great work and to her marriage to actor Kevin Bacon.

"Big Love" season opener, 6 p.m., HBO. In a polygamous home, this series says, the role of the "first wife" is paramount. That's Barb (Jeanne Tripplehorn), sturdy and dependable. At the end of last season, however, her multiple marriage was exposed. As this fairly good episode begins, she's despondent and the family is wobbling.

"Hell's Kitchen," 7 and 8 p.m., Fox. First is a rerun of last week's repulsive season opener, with Gordon Ramsay screaming, shouting and sending his customers home hungry. Then comes a new hour, reportedly with a meltdown by one of his contestants.

"Two and a Half Men," 8 p.m., CBS. Rose is definitely leaving, and Charlie realizes how much he'll miss her. Also, Allison Janney of "The West Wing" guests as Alan's rough date from the Internet.