THE VAMPIRE DIARIES’ NINA DOBREV APPEARS IN FLASHBACKS AS TATIA, THE ORIGINAL DOPPELGANGER — In order to show Elijah (Daniel Gillies) that her plan is what’s best for him, Esther forces him to relive a time long ago when he loved a young woman named Tatia (guest star Nina Dobrev). With the help of Marcel (Charles Michael Davis), Hayley (Phoebe Tonkin) is determined to find Elijah, who has gone missing, but is torn when she discovers that Klaus (Joseph Morgan) is also in trouble. Elsewhere, Cami (Leah Pipes)