Watch The Flash Season 6 Episode 4 Full HD Online with SUB

While Rosso steals more blood for his treatment, flashbacks reveal how he once cared for his mother before she was diagnosed with GLH, and how upset he was that she apparently gave up before she died. While the Flash team processes what Barry and Iris told them, Cisco refuses to accept it and vows to save the former. In response, Barry decides to train Cisco to become the new leader of Team Flash after he leaves, working with him to save Rosso. Nash shows up and offers his help in exchange for a "crypto scheme" that he claims only Cisco can build. The three raid McCulloch's technology for the regenerating serum, though Cisco pockets it to save Barry and claims it was sold. Later, Barry finds out about it, and they have a fight. Barry gives the serum to Rosso, hoping it will save him, but it doesn't work, making Rosso realize that he needs blood filled with adrenaline to save himself. He attacks the hospital and kills several people, even despite the Outbreak and the arrival of Frost, before escaping. When Barry vows to stop him, he and Cisco reestablish their friendship. Elsewhere, Nash searches the sewers, tracking the Monitor's movements.