“Chuck” (8 p.m., NBC): Have you heard? Nerds are hot this season. And

“Chuck” (8 p.m., NBC): Have you heard? Nerds are hot this season. And “Chuck” has a highly likable one in Zachary Levi, who plays a socially stunted computer tech who somehow downloads top-secret data into his head. Now, instead of fighting computer viruses, he must confront international terrorists who covet that data. Think of it as a geeky version of “Alias.”

“Dancing with the Stars” (8 p.m., ABC): Can Cameron Mathison keep his shirt on as the new season waltzes in?

“Big Bang Theory” (8:30 p.m., CBS): Nerds pant over their new neighbor.

“Heroes” (9 p.m., NBC): Last season’s No. 1 new show, “Heroes,” went out with a bang. Literally. But did Peter Petrelli really explode in the sky above New York? And what the heck is Hiro doing in feudal Japan? Inquiring minds want to know.

“Fog City Mavericks” (9 p.m., Starz): Starz is introducing a series of original specials about people, trends and culture in movie entertainment. Hosted by film critic Richard Roeper, “Starz Inside” kicks off with “Fog City Mavericks: The Filmmakers of San Francisco,” which looks at biggies in the film biz who call the Bay Area home. They include George Lucas, Francis Ford Coppola, Clint Eastwood, Chris Columbus and producer Saul Zaentz, whose comments are intertwined with moments from some of their most memorable works. Future “Starz Inside” editions will focus on vampires in film and the worldwide success of animé.

“Journeyman” (10 p.m., NBC): A reporter (Kevin McKidd) discovers he is being pulled backward in time.