TODAY'S MUST-SEE

"Sesame Street" season-opener, 6 and 11:30 a.m., PBS Hawaii. One of TV's best shows, albeit for a quite-young audience, starts its 39th season, with actor Jack Black and Feist as guests. There's more emphasis on verbalizing math concepts this year. That starts with an adventure search for "The Golden Triangle of Destiny." Also new: a character named Leela and animated adventures with Bert and Ernie.

Olympics, 10 a.m.-1 p.m. (delayed), 6-10 p.m. (delayed), 10:30 p.m.-midnight (delayed), NBC. Here are the team finals for women's gymnastics, which Americans seem to savor. Also, Michael Phelps could go for two more gold medals in the 200-meter butterfly and the freestyle relay. The daytime includes beach volleyball, swimming preliminaries, kayak and canoe finals and water polo between the U.S. and Italy.

OF NOTE

More Olympics, on cable. That includes round-the-clock replays (11 a.m.-11 p.m.) and live coverage (11 p.m.-11 a.m.) on MSNBC, 11 a.m.-2 p.m. and 6-11 p.m. on CNBC, 3-5 p.m. on Oxygen and 8 p.m.-6 a.m. on USA.

"Broken Trail" (2006), 5 p.m., AMC. This well-crafted film has a cattle drive interrupted by rescue, revenge and romance. The result won Emmys for best miniseries, its stars (Robert Duvall and Thomas Haden Church) and its casting.

"House," 7 p.m., Fox. Here's a rerun of the season opener, reminding us how brilliant this show can be. Dr. House has no staff, so he bounces ideas off the janitor — even giving him a lab coat. That surrounds a case in which everything about the patient defies previous medical reports. The explanation might seem like a stretch, but it has happened in real life.

"NCIS," 7 p.m., CBS. The team had planned to catch weapons dealers; instead, it witnesses a murder.

"Wipeout," 7 p.m., ABC. In a change of plans, this show tosses in a rerun. Contestants include a nanny and a funeral home counselor.

"Terminator: The Sarah Connor Chronicles," 8 p.m., Fox. Hey, the first day at a new school is always kind of rough. John sees confusion, rumors and a possible suicide. Meanwhile, his mom is busy trying to prevent the planet from being blown up in the future.

"Primetime: Medical Mysteries" season opener, 9 p.m., ABC. One story views a tragedy during a surfing vacation in Hawaii; another sees a man whose condition gives him warts that resemble bark.