Now that the Travelers’ game plan has been revealed — wiping out the vampires of Mystic Falls using doppelganger blood — Stefan and Elena are on the run when The Vampire Diaries returns with Season 5, Episode 20 ("What Lies Beneath"). 
With Markos and the Travelers out for blood, Damon decides to hide out in a remote cabin in the woods with his brother and his ex-girlfriend, who also happens to be his brother’s ex. Yeah, this shouldn’t be complicated at all. But at least Caroline will be there for some much needed comic relief.
However, all of this time together is making it hard for Stefan and Elena to keep their secret — that Enzo is dead — and it doesn’t take long for Damon to get suspicious. So Damon comes up with a parlor game designed to expose the truth. But that’s not the only thing they have to worry about. A ghostly presence at the cabin uses violence and fire to make itself known.
Meanwhile, Matt tries to get information from one of the Travelers, and Bonnie continues to keep the truth about the Other Side from Jeremy, despite warnings from Grams.
Watch the promo below.