User blog comment:Paul.rea/Teen Wolf News 021613/@comment-84.91.200.51-20130216184356/@comment-4091815-20130219024012

Can't believe we're talking TVD on her but... there's not really a rule against it and this is one of my articles so...

Katherine's story is the backbone of the entire series.

She came to Mystic Falls.

Her actions tipped off the founders and set in motion a decades long battle of wills between Damon and Stefan which culminated in the 21st century with their meeting Elena.

So why does Elena look exactly like Katherine?

Because she's the doppelganger.

What's the big deal about a doppelganger?

Oh yeah, see it's this spell that was cast a long time ago on the Original Vampires and the Original Werewolves and well...

Oh Noes! We've had to introduce the Originals and we're barely into Season 2.

I'm So Sorry to ruin the whole thing but in order for Katherine to exist and specifically in order for Elena and Katherine to look exactly alike, you have to have the originals and the curse and the whole bloody thing.