Although The Hills may have helped you survive, it's been a long, Laguna Beach-less summer. Now MTV has returned to the real O.C. (without LC) for a third season, and there's a whole new crop of affluent teens to get to know (including LC's little sister, Breanna). The show is still about ''sketchy'' boys, ''super-random'' text messages, and unsupervised partying, but a lot has changed. The guys are much better looking (in an Abercrombie kind of way); there appear to be three cliques instead of two; and the main character this season, Tessa, is not a Conrad. (But much like Screech in Saved by the Bell: The New Class, season 2 irritant Jessica is back, at least for a story line or two.) Now, it wouldn't be fair to compare the new cast members with their predecessors, but it would be fun. So we're doing it. Check out who's who and the ways they resemble and differ from the stars of past seasons.