The fact that the world of rock no longer objects to television causes the odd rheumatic knee twitch in people who grew up in the ’90s indie orthodoxy. But that doesn’t mean it hasn’t had some positive cultural side effects. Consider the super-smart, weirdly excellent band Polaris—which was formed to make music for the Nickelodeon show The Adventures of Pete & Pete—whose R.E.M./Pavement/ Velvet Underground–index pop never had a chance of breaking through to the snobs who would have loved it. They’d almost definitely have fared far better today than they did in 1999, the year their only album came out. Or maybe bands like this need the cushion of posterity to be considered acceptable. Even though everyone likes to complain about how the internet killed obscurity, songs like the loose, downtown dirty “Summerbaby” are legitimate lost classics, all the more precious because “nobody knows, nobody knows” them. Well, not nobody. If there’s one thing the internet is good for, it’s reminding you that it’s never nobody. Polaris are back for the time being, on their first tour ever, tonight at the Crocodile. (And The Great Big Happy Green Moonface, their new "digital cassingle," is a bargain at $1.99.)