7 p.m. Sept. 15, CW
Where they left off: Jeremy was visited by his dead vamp girlfriends Vicki and Anna after he was brought back to life by current sweetie Bonnie. Klaus successfully turned himself into a half-vampire, half-werewolf hybrid, which didn't make him any nicer. He reintroduced Stefan to the joys of human blood fresh from the source and they skipped town together. Elena kissed a dying Damon, who didn't die after all.
This season: Good guy vamp Stefan goes on a blood-sucking bender with Klaus. At Comic-Con, Wesley said he loves being bad. With three girlfriends, Jeremy will A) finally have some fun; or B) wish witch Bonnie had never brought him back from the dead. Caroline's Matt/Tyler love triangle is cleared up when she goes for the wolf man. Elena (Nina Dobrev, left) will celebrate her 18th birthday without Stefan (Paul Wesley, right), but with Damon (Ian Somerhalder, center).
See a sneak peek video here.