Season 6 of this palate-pleasing series begins tonight just as Top Chef Masters comes to a close. (That show's finale airs at 10:15 pm/ET.) It's viva Las Vegas when 17 fresh chefs roll the dice and infiltrate the gambling mecca to compete in culinary challenges galore. On the menu this season: Potential family drama when two chef brothers compete, plus a fine list of slated guest stars, including Natalie Portman, Penn and Teller, Wolfgang Puck and Tyler Florence. Padma Lakshmi, Tom Colicchio, Gail Simmons and Toby Young return in their series roles.
* 'America's Got Talent (9/8c NBC)'
The showy summer series storms through its fourth season, grabbing blockbuster ratings in the process. Perhaps the show derives drawing power from its robust variety-show value, or from the contestants' thrilling victories and agonizing defeats, or from all those off-the-wall acts. (It's hard to look away from clog-dancing sisters, a Baywatch-themed dog act or patriotic cowboy tenors.) The plot thickened last night when 10 acts from the Top 40 performed, and five of them will win a slot in the sought-after Top 20 in tonight's results show.
* Bobb'e Says (8/7c Cartoon Network)
After making a splash as Seann William Scott's foul-mouthed charge in 2008's Role Models, Bobb'e J. Thompson has landed his own show on Cartoon Network. And while he won't be quite as outrageous as he was on the big screen, viewers can expect plenty of practical advice and words of wisdom dispensed by the young actor with a unique perspective. In the premiere episode, Bobb'e hangs out with Tony Hawk at his warehouse, and the pair go over footage of Hawk's mishaps.
The brisk caper series begins wrapping up for its fall hiatus (the summer-season finale airs next week), so this justice league of thieves, grifters and hackers hopes to have a magic touch tonight. And magic it will be: Nate and his scheming dream team put on a faux magic show in a ploy to take down a corrupt corporation that has been marketing tainted food. But they'll need to use every trick in the book to slip through the corporation's tight security.
* Octomom: The Incredible Unseen Footage (8/7c Fox)
Eight new mouths to feed! What's a single mom who already has six kids to do? Selling filmmakers access to the brood is one way to pay for all the formula that "Octomom" Nadya Suleman must need, and producer Craig Piligian (Dirty Jobs) bought seven months' worth. The result is on display tonight, and (if the promos are any guide) it's both noisy and plaintive, as Suleman tries to come to grips with her fertility-drug adventures. "What was I thinking?" she asks at one point. What, indeed?