Invincible

"Invincible" is the twenty-second episode of the second season of The Flash, and the forty-fifth episode overall. It aired on May 17, 2016.

Synopsis
After Zoom unleashes an army of Earth-2 meta-humans on Central City, Barry feels that he can be untouchable, but Barry is shaken when he sees their leader is the Black Canary's Earth-2 dopplegänger, the Black Siren. Meanwhile, Wally takes to the streets to help The Flash stop the meta-humans, which worries Joe. Iris and Henry are concerned about Barry taking on Zoom.