“American Idol” (8 p.m., Fox): So, have you had your fill of the “American

“American Idol” (8 p.m., Fox): So, have you had your fill of the “American Idol” audition sessions yet? Hang tight, dawg, they’re not done. Tonight, Simon, Paula and Randy make their way to San Diego, where more musical mayhem awaits. Then, on Wednesday, the gang seeks some Southern hospitality in Charleston, S.C.

“Growing Up Online” (9 p.m., PBS): There’s a sprawling world that kids create online, and it raises questions about just how radically the Internet is transforming the experience of childhood. As more kids begin to grow up with an online alter ego, parents find themselves on the outside looking in, struggling to stay engaged in their children’s lives. At school, teachers are trying to figure out how to reach a generation that no longer reads books or newspapers. “Cyberbullying” has become a problem, as is the threat of online predators. How to deal with Facebook Nation? That’s what “Frontline” investigates in “Growing Up Online.” One expert concludes that the older generation is obliged to “teach ourselves and our children to live in a society” where online social interactions “are fundamentally a way of life. This is public life today.”

“Some Assembly Required” (10 p.m., Discovery): This new series throws open the factory doors and examines the process of making and manufacturing the products that we use on a regular basis. Tonight’s episode includes a tour of a Wisconsin cheese factory and a visit to a New York plant where Steinway pianos are built.

“The Millionaire Matchmaker” (11 p.m., Bravo): Money, apparently, can buy you love.