It looks like The Flash is getting a new villain! William Sadler is joining the cast on the second episode. The ‘Iron Man 3′ actor will be joining the cast as Simon Stagg. He’s the CEO of one of the major corporations in the DC universe, Stagg Industries. He’s already been mentioned in ‘Arrow’ so it’s possible he could pop up there. After trying to prevent a man from dating his daughter, Stagg indirectly becomes responsible for the origin of the superhero Metamorpho. The show and Sadler both announced the news on Twitter.