The Justice Society captures the team, believing them to be Nazi spies. Nate reveals that he is the grandson of JSA member Commander Steel. After the JSA is assigned a mission to obtain information on Nazi Captain Baron Krieger, they release the team and strongly advises them to leave 1942. The JSA learns that Krieger was given a serum by Eobard, who wants to make a deal for an amulet in Hitler's possession. Nate soon discovers that the JSA dies on this mission, so the team travels back to rescue them. While the others collect the amulet and fight the Nazis, Krieger uses the serum on himself and turns into a monstrous superhuman. He manages to capture Ray and JSA member Amaya. Ray offers to replicate the formula to save Amaya. The teams then attack the Nazi base, save Ray and Amaya, and take down Krieger. However, hemophiliac Nate is critically injured in the process. Ray saves him by using the modified serum he developed. After the team departs, Eobard appears at the JSA headquarters and stabs Rex Tyler to erase him from the timeline before stealing the amulet. A dying Rex whispers "time traveler" to Amaya.