Following events from "The Murder of One," it's all become clear on The Vampire Diaries: everything comes down to Rose.

Who turned this ancient blood sucker? The answer to that question will go a long way toward deciding what Damon, Stefan and company can do about The Originals - and who better to ask than Rose herself?!?

Yes, we know: she's dead. But Jeremy can go all Sixth Sense on dead people, hence why Damon and Elena head to Colorado on April 19, as teased in these Vampire Diaries episode photos. Will the younger Gilbert sibling be successful?

Watch this extended preview for "Heart of Darkness" and see for yourself:

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.