When Vicki and Anna, both heretofore known as "dead," appeared to Jeremy in the season finale of The Vampire Diaries, it raised a lot of questions. Can only Jeremy see them? Is it significant that the late former girlfriends were both also vampires? Will he see more dead people? Why have they returned?

"They have their own master plan," executive producer Julie Plec  reveals.

"The minute you get any supernatural entity dropping into Mystic Falls, somebody is going to be at risk." Plec, co-executive producer Kevin Williamson, and their team of writers have just returned to the writers' room in Atlanta, where they're plugging away on scripts for Season 3 The Vampire Diaries, which Plec says will explore the history of the original vampire family. She hints at a flashback to the year 1000, deconstructs the "Delena" kiss and reveals the unique way they'll set the stage for the show's return in September.