TONIGHT'S MUST-SEES

"Trust Me" debut, 8 p.m., TNT. Mason and Conner (Eric McCormack and Tom Cavanagh) are a Chicago ad-agency team. They're quick-thinking, loose-thinking; they play it by ear. But what happens when one becomes the other's boss? That starts a show that skillfully blends drama and comedy. Oddly, the ad ideas simply aren't that good. Everything else about the show, however, is great fun. McCormack and Cavanagh bounce off each other beautifully, reminding us of the best moments of "Studio 60 on the Sunset Strip." Monica Potter has a terrific supporting role as Sarah Krajicek-Hunter, a prize-winning ad writer, ready to be a star. Griffin Dunne, needing a fraction of his immense talent, plays the troubled boss. Now two cable shows provide perfect bookends. "Mad Men" views the early advertising days, cautious and button-down; "Trust Me" catches a wild, modern era. Both are fun.

"American Experience: The Trials of J. Robert Oppenheimer," 9 p.m., PBS. There were plenty of skeptics when Robert Oppenheimer became director of the Manhattan Project. Here was a physicist and prof who hadn't run anything; he'd never been a department chairman. He had an abstract mind, given to French literature and Hindu philosophy. You wouldn't appoint him to run a hotdog stand, critics said. Still, he beat massive odds to have the atomic bomb ready to end World War II. Later, however, he drew criticism for his collection of friends and relatives, some of them members of the Communist Party. This film — from brilliant writer-director David Grubin — centers on the 1954 trial, to decide whether Oppenheimer should retain his security clearance. Wrapped around that are glimpses of a fascinating life.

OF NOTE

"Olivia" debut, 9:30 a.m., Nickelodeon. Olivia is a little pig (age 6 3/4) who stars in books. Now she has an immensely charming, animated series. In today's first story, she frets about the day her little brother will be taller than she is; in the second, she has a make-believe Hotel Olivia. In both, she's willful, playful, self-centered and extremely likable.

"Private Screenings: Ernest Borgnine" (3 and 6 p.m.) and "Marty" (1955, 4 p.m.), Turner Classic Movies. At 92, Ernest Borgnine remains an immensely vibrant man, physically and socially. Here he spins stories gracefully, telling how a tough-looking Navy veteran became a Hollywood star; afterward, TCM shows his Oscar-winning work in "Marty."

"Superstars of Dance" finale, 7 p.m., NBC. It's time to learn which nation is the overall winner.

"Big Bang Theory," 7 p.m., CBS. An all-rerun CBS night begins with friends trying to cure Sheldon's fear of driving.

"The Last Templar" conclusion, 9-11 p.m., NBC. In Sunday's opener, an ancient artifact was stolen; it may be the key to a priceless document. Now a passionate archaeologist (Mira Sorvino) crosses the globe in search of it. The ending is so-so, but "Templar" does make splendid use of Moroccan settings and a fine supporting cast that includes Scott Foley, Victor Garber and, tonight, Omar Sharif.

"The Closer," 8 p.m., TNT. When the last batch of new episodes ended, Sanchez had been shot three times and Fritz had given Brenda a marry-or-else ultimatum. Brenda dislikes both marriage and ultimatums, so no one was sure what would happen. This episode (preceded by a rerun at 8) tells us, during an episode that's merely OK, despite the return of Barry Corbin and Frances Sternhagen as her parents.

"CSI: Miami," 9 p.m., CBS. This reruns the season-opener, which began with Horatio being shot on an airport tarmac. It's an exceptionally bad episode, with huge leaps of logic and flatly robotic acting.