We've always adored 'Arrow''s effort at crowd-pleasing casting, and it seems CW spinoff 'The Flash' has inherited the gift. Following 'Prison Break' alum Wentworth Miller's casting as Captain Cold, onscreen brother Dominic Purcell will also menace 'The Flash' as DC villain Heat Wave, reuniting the two stars.

Courtesy of The Hollywood Reporter, Purcell will appear beginning with the series' tenth episode as Mick Rory, a "pyromaniac who finds an outlet for his obsession with fire when he teams up with Leonard Snart/Captain Cold (Miller) and becomes the villain known as Heatwave." Having last played Michael Scofield and Lincoln Burrows in 2009's 'Prison Break' finale, Miller and Purcell will also reunite in the former's first 'Flash' appearance in episode 4, as Purcell's Rory is "heard from in that episode."

For those unfamiliar with the character, Heat Wave has frequently been portrayed as a member of Captain Cold's "Rogues" team in DC comics, and has appeared in animated form several times before. Intriguingly, the eighth episode of 'The Flash' will also see Robert Knepper reprising his role as 'Arrow' villain The Clock King, Knepper having similarly "broken out" in FOX's 'Prison Break.'

Greenlit for (at least) 13 episodes, ‘The Flash’ also boasts among its cast Tom Cavanaugh’s Dr. Harrison Wells, Candice Batton's Iris West, Danielle Panabaker's Caitlin Snow and Carlos Valdes’ Cisco RamonJesse L. Martin’s Detective West, ‘The Vampire Diaries‘ star Rick Cosnett as Central City Police transfer Detective Eddie Thawne, and original ‘Flash’ star John Wesley Shipp as Barry’s father Henry Allen.

Additionally, 'Arrow' star Stephen Amell's cousin Robbie has also signed on to play an incarnation of DC superhero Firestorm, joining such colorful DC characters as Kelly Frye's Plastique, Greg Finley's Girder, and Clancy Brown's General Wade Eiling.

We're still a bit on the fence for 'The Flash,' and will have a full pilot review in the coming weeks, but you've got to admire their commitment to cool DC castings. What do you think of the 'Flash'-y new additions to the CW's fall debut? Watch the trailer below, and tell us what you think of the latest 'Flash' news, before the October 7 premiere!

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