When aliens called the Dominators attack Central City, Barryspeeds over to Star City to ask the Green Arrow for help instopping them. Realizing the battle against the Dominators isbigger than they thought, they track down the Legends ofTomorrow, and Barry and Cisco create a breach to bring back asecret weapon - Supergirl. Once all of the super friends areassembled, they come up with a plan to attack but a shockingsecret related to Flashpoint is revealed and suddenly no one issure who they can trust. Meanwhile, Wally wants to join thebattle against the aliens but Iris tells him he's not ready.
