The moon is full and the wolves are howling in The Vampire Diaries‘ final new episode until January (airing tonight at 8/7c on The CW). No one in Mystic Falls — good or bad, human or supernatural — is safe. “Elena takes it all on herself,” says Nina Dobrev, who does double-duty as the selfless heroine ready to do whatever it takes to save her loved ones and as Katherine, the seductive, selfish vampire currently stashed in the town’s blood-sucker tomb. While Elena is in deep emotional pain, “everyone thinks she’s unstable,” says Dobrev. Continue Reading at TV GUIDE