Iris Tests Out Her Speedster Abilities In New The Flash Sneak Peek

A new sneak peek from the upcoming episode of The Flash has been released. This episode is titled “Run Iris, Run” and it will air tonight, March 13.

In this new sneak peek, Caitlin runs tests on Iris to confirm that she is a speedster. Barry, on the other hand, finds out that all of his DNA is now in Iris and must figure out a way to get it back.