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Barry’s plan to defeat the Forces without helping Nora kill them is to travel back in time and prevent them from being created in the first place. Their creation happened the same night Team Flash fired up the Artificial Speed Force, which explains the different colored lightning that emanated from the rooftop beam. Barry and Iris both have a little bit of all the forces inside them, as they are effectively the parents of Fuerza, Psych, and the Still Force. Hey, it all worked out so well last time Barry and Iris were parents, so why not?
Traveling back in time is one of the big no-nos for Team Flash, as Cisco is quick to remind everyone. Doing so could create another Flashpoint, screw up the timeline, and cause more problems than it solves. Iris is definitely not down for this plan, and Cisco has his strong doubts as well. Barry thinks he can prevent any timeline confusion by...well, going back in time and finding Harrison Wells in the year 2000, relaxing at home with his wife. It’s a little strange to see Tom Cavanagh here just a week after the news that he’s already left the show, but we were promised guest appearances and here’s the first one.