Get ready, Revenge fans, because Victoria Grayson is back, and she's out for blood. The new trailer for Revenge's fourth season is here, and in it, Victoria calmly explains everything she knows about Emily Thorne's real identity. Then, she vows to get even. As you may recall, the season three finale left Conrad Grayson dead, David Clarke alive, and Victoria in a mental institution. The show returns Sept. 28, and we can't wait to see how Victoria escapes and sets down her own path of retribution. Watch the full trailer below.