Dominic Purcell has jumped onboard The CW's "The Flash" as the villain Heatwave. Purcell plays Mick Rory, a pyromaniac who finds an outlet for his obsession with fire when he teams up with Leonard Snart/Captain Cold (Wentworth Miller) and becomes Heatwave. The tenth episode of the season will mark the first re-teaming of "Prison Break" co-stars Purcell and Miller since that series ended in 2009. Miller was cast in his role "The Flash" back in July and makes his debut in episode four.