Vampire Diaries Brings Sex, Blood and Doppelgangers to Season 2

Vampire Diaries' freshman season saw Katherine, the 150-year-old doppelganger to Elena, ignite a fire in Mystic Falls that claimed many lives. Judging by Katherine's additional nefarious misdeeds in the clip below—hooking up with Damon, strangling Bonnie, coming face-to-face with Elena!—Season 2 will be wilder. Vampire Diaries' Julie Plec: The love triangle becomes a square Check out the trailer:

Natalie Abrams Aug. 19, 2010 at 4:11 p.m. PT