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The power of doppelgangers.... While Elena and Damon try to explain Amara's (played by series star NINA DOBREV) situation to Stefan, Dr. Wes Maxfield (recurring guest star RICK COSNETT) gives Katherine some deeply disturbing news. Nadia (recurring guest star OLGA FONDA) shows up at Caroline's dorm room searching for Katherine. After a surprising conversation with Amara, Jeremy and Bonnie share a glimmer of hope. Silas fails to keep a promise, causing Damon to turn to Tessa (recurring guest star JANINA GAVANKAR) for help with his new plan, and Stefan makes a heartbreaking confession to Damon and Elena.