The Vampire Diaries,3x18, "The Murder of One," aired 29 Mar. 2012. L to R: Stefan Salvatore (Paul Wesley), Damon Salvatore (Ian Somerhalder), and Elena Gilbert (Nina Dobrev). Matt Donovan, played by Zach Roerig: "What are we doing here?" Damon: "We found some more white oak. Long story. Wait for the movie." Elena: "Hang on. White oak? You have a weapon that can kill Klaus?" Stefan: "Nope. We all have a weapon." Stefan drops a duffel bag in front of them filled with white oak stakes.