Zoom unleashes an army of Earth-2 meta-humans on Central City — including an evil version of Laurel Lance. Meanwhile Wally puts himself at risk to try and help the Flash, Barry’s loved-ones become concerned about his confidence level following his recent experience, and Cisco has a vision of the end of the world.

U.S. air dates are in MM.DD.YY form. U.K. air dates are in DD.MM.YY form.

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KATIE CASSIDY GUEST STARS AS BLACK SIREN

After Zoom (guest star Teddy Sears) unleashes an army of Earth-2 meta-humans on Central City, Barry (Grant Gustin) is shaken when he sees their leader is the Black Canary's Earth-2 doppelganger, the Black Siren (guest star Katie Cassidy). Meanwhile, Wally (Keiynan Lonsdale) takes to the streets to help The Flash stop the meta-humans, which worries Joe (Jesse L. Martin). Iris (Candice Patton) and Henry (guest star John Wesley Shipp) are concerned about Barry taking on Zoom.

Jesse Warn directed the episode with story by Greg Berlanti & Andrew Kreisberg and teleplay by Brooke Roberts & David Kob (#222).