"I just came up with a list. It's called 'Things You Suck At,'" Damon says to Klaus in the exclusive sneak peek below. "No. 1: Finding Katherine. No. 2: Covering up your secret phone conversations with that little backstabber Haley."
So how are Katherine and Haley related? And will Damon convince Klaus he needs to help find them?
Watch to find out:
The Vampire Diaries airs on Thursdays at 8/7c on The CW.