1, the seventh episode tells about Barry's return to the lab and immediately tells his companions about it. Barry promised Alice that he would arrange their wedding first and then consider other things. Wally also returned to the team at this time, saying that he would contribute to the war between Barry and Clifford. Clifford and Mariezer have been watching Barry, and he doesn't seem to let Barry and Iris's wedding go smoothly.
2. The eighth episode tells that the evil super girl needs a new heart, and they find the best "donor", Barry and Arrow's partner Carla. In the process of Barry and Iris's wedding, in order to win Kara's heart, the Nazi legion of Earth X crossed to Earth I in the rift of time and space, and Barry and others were accidentally caught in the Nazi concentration camp of Earth X, and a hard war began.
Extended data:
Plot introduction:
It has been six months since Barry walked into the space of speed alone in order to stabilize the prison of speed. Iris became a member of the cutting-edge laboratory, where she directed Wally and Sisco to various computer screens and gave them tactical guidance.
Barry allen was rescued from fast space by his partners in the cutting-edge laboratory, but he became a completely different person. Barry soon adapted to the life in Midtown, and he quickly made up for the lost life and entertainment by speeding up. Besides his life, Barry returned to his job, and Sisko joined the police station, making it easier to hunt down Barry's haunts.