THE POWER OF dopplegangers - While Elena and Damon try to explain the situation to Stefan Amara, Dr. Wess (guest star Rick Cosnett) Katherine gives some deeply disturbing news. Nadia (guest star Olga Fonda) is presented in Caroline's bedroom in search of Katherine. After a surprising conversation with Amara, Jeremy and Bonnie share a glimmer of hope. Silas leaves to fulfill his promise forcing Damon to seek the help of Tessa (invittada star Janina Gavankar) for your new plan. Stefan made a heartbreaking confession to Damon and Elena. Lidman Leslie directed the episode written by Rebecca Sonnenshine.