Vampire Diaries Spoilers on Katherine

Zap2it has some Katherine/Elena tidbits:

We visited the set last week and — in addition to getting some scoop on Tyler’s return — we also got to watch Nina Dobrev pull double-duty as she filmed a scene for episode 418, “American Gothic.” In the past, we’ve seen Katherine pretend to be Elena plenty of times, but now, we’ll get to see Elena’s best impression of Katherine. Katherine didn’t seem too impressed by the likeness, though… she thinks Elena’s innocence will be a dead giveaway. (Not to mention her haircut.)