The Flash: Things You Can't Outrun Clip Introduces Ronnie Raymond

There's a Firestorm brewing on The Flash tonight as the series flashes back to the night of the particle accelerator accident and introduces Caitlin Snow's fiance Ronnie Raymond.

You can check out the clip -- which sees the moments of celebration around the activation of the particle accelerator just before the realization that they were "all in big trouble" -- below courtesy the Variety YouTube page.

And the next time we see Ronnie, actor Robbie Amell says, he'll be Firestorm...

The Flash episode titled "Things You Can't Outrun" airs tonight at 8 p.m. ET/PT on The CW.