"While You Were Sleeping" is the 16th episode of the fifth season of the American series The Vampire Diaries and the series' 105th episode overall. "While You Were Sleeping" was originally aired on March 20, 2014, on The CW. The episode was written by Caroline Dries and directed by Pascal Verschooris. Plot Elena (Nina Dobrev) wakes up in her body after three weeks since the day Katherine has taken over it and, she is trapped at the college dorms. Stefan (Paul Wesley), Bonnie (Kat Graham) and Caroline (Candice Accola) asked Liv (Penelope Mitchell) to cast a spell and seal her there since they can find out the antidote of the ripper/werewolf virus that Katherine injected her body with before she died. Stefan is there with her while Bonnie is with Liv trying to teach her how to practice magic and Caroline is at Wes' laboratory trying to find the antidote. Meanwhile, Damon (Ian Somerhalder) is also locked up and chained at the Salvatore house's basement, waiting for the antidote. Jeremy (Steven R. McQueen) and Matt (Zach Roerig) guard him and bring him some vampire blood every few hours. Caroline runs into Enzo (Michael Malarkey) who tells her that he was working with the travelers and they have the antidote but to give it to them, Stefan has to meet with the travelers. Caroline calls Stefan and agrees to meet them, leaving Elena alone. Elena and Damon are on the phone talking about those three weeks and Damon tries to fill Elena in. He tells her that he killed Wes but he does not tell her that he also killed Aaron (Shaun Sipos). Elena starts having the symptoms of the virus and she hallucinates, nose bleeding and coughing blood. In her hallucinations she sees Katherine hitting on Stefan while she tries to tell him that Katherine has taken over her body. Stefan finds Caroline and Enzo where they agreed to meet. The travelers are also there and inform Caroline and Stefan that they managed, with the help of Enzo, to find an antidote for the ripper virus but they need something in exchange to hand it over to them. The travelers need Stefan to help them find his doppelganger by linking him to Stefan. Stefan hesitates at first since when Tessa did that to him in the past and linked him to Silas, he had lost his memories. Sloan (Caitlin McHugh)