The team are able to stabilize Dr. Stein, but only for a short period of time while they can locate another viable partner for the Firestorm matrix. The team identify two potential candidates, a scientist named Henry Hewitt and a former high school football star named Jefferson Jackson. Hewitt is excited to merge with Stein, but the attempt fails and Hewitt leaves angrily, but also now unknowingly connected to the Firestorm matrix. Jefferson initially refuses, but when Hewitt goes on the attack with his new abilities Jefferson agrees to merge with Dr. Stein. After the successful merge, the new Firestorm joins Barry in helping to take down Hewitt, forcing Hewitt to get angrier until he burns himself out and loses his abilities. Meanwhile, Dr. Wells breaks into Mercury Labs and steals an unknown device. Later, Barry is attacked by a humanoid shark monster sent by Zoom to kill the Flash, but he is saved when Dr. Wells uses the device to incapacitate the creature.