'Vampire Diaries' season 5 hits the CW Network and the blood suckers from Mystic Falls are joined by a few new cast members. As John Basedow (@JohnBasedow) reports, season 5 promo pictures show a gun slinging Nadia (Olga Fonda) and mysterious Tessa, who's played by 'True Blood' veteran Janina Gavankar. Damon (Ian Somerhalder), ElenaKatherine (Nina Dobrev), StefanSilas (Paul Wesley) and the other supernatural beings look to be in for more drama this fall.