The SDCC 2017 trailer for season four of The Flash – narrated by Iris West (Candace Patton) who is trying to be strong for Barry – finds Cisco trying to bring the Flash back from the Speed Force to deal with a super samurai with a sword that easily handles Kid Flash.
The Flash returns on October 10th (The CW, 8/7C).
https://www.youtube.com/watch?v=bYDdu_mC6cI
The world needs The Flash. Season 4 premieres October 10 at 8/7c on The CW.