Greg Finley has been the latest villain addition in The Flash series. He will play Tony Woodward aka Girder who can "transform his skin into living metal" after the explosion at S.T.A.R. labs and will appear in episodes 6 and 7.
As for the background of the character, Tony was the bully that tormented Barry Allen (Grant Gustin) when they were kids. Now as adults, Tony goes on a crime spree as Girder, and Barry may be the only one who can stop him.
The Flash premieres Tuesday, October 7th at 8pm on CW.