Now that Katherine is no more — she was sucked into a black vortex of doom in Season 5, Episode 15 (“Gone Girl”) of The Vampire Diaries  — it’s finally time to move forward with the Traveler storyline and figure out just what they’re up to with their desire for doppelganger blood. And it looks like Season 5, Episode 16 (“While You Were Sleeping”) is going to get that ball rolling.

A lot is going to go down in this episode, but here are our highlights: Stefan (Paul Wesley) will attempt to fill Elena (Nina Dobrev) in on what’s been going down, Caroline (Candice Accola) discovers a “frightening secret” in Dr. Wes’ files, Enzo has a “solution,” and Elena meets Luke on campus during spring break and they decide to get wasted. That’s just scratching the surface of this action-packed episode.

Check out the full synopsis for the March 20th episode here:

When Stefan tries to explain recent events to a very sick Elena, her first instinct is to call Damon (Ian Somerhalder). At the same time, Damon is trying to figure out how to make a disturbing confession to Elena. While going through Dr. Wes’ files, Caroline discovers a frightening secret, and is surprised when Enzo (guest star Michael Malarkey) appears, claiming to have the solution everyone is searching for. At Enzo’s insistence, Caroline asks Stefan to meet her at a mysterious location where they are joined by a group of Travelers, including Sloan (guest star Caitlin McHugh), who reveals new information on the importance of doppelgangers. During spring break on a mostly deserted Whitmore campus, Elena runs into Luke (guest star Chris Brochu), a student who seems to know her, though she has no memory of meeting him. Recently dumped by his boyfriend, Luke proposes that he and Elena spend the break getting drunk together, but she sends him off on an urgent mission to find Bonnie (Kat Graham) and the “newbie” witch, Liv (guest star Penelope Mitchell). Damon finally tells Elena the truth about his recent activities, and they come to a new agreement about their relationship.

Are you excited Luke is finally here? How do you think this Traveler storyline is going to go? Hit the comments and speculate!

The Vampire Diaries airs Thursday nights at 8 p.m. ET on The CW.
Carson Blackwelder is an Assistant Editor at Wetpaint Entertainment. Follow him on Twitter and Google+!