EXCLUSIVE: Another popular recurring DC character from the Arrow-Flash universe is boarding the CW’s proposed spinoff from the two superhero dramas. The new Flash villainous duo of Captain Cold/Heat Wave will be staying intact as Dominic Purcell has joined Brandon Routh, Wentworth Miller, Victor Garber and Caity Lotz in the superhero team-up show from Arrow creators Greg Berlanti, Andrew Kreisberg and Marc Guggenheim.

millerpurcellPurcell will reprise his role as 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 the villain known as Heat Wave. The new project, eyed for a midseason launch next season, extends the Flash reunion of Prison Break stars Miller and Purcell and would mark the first series regular gigs for both actors since the cult Fox drama.

purcellheadshotRouth and Garber also are set to reprise their popular Arrow/Flash characters  — Arrow‘s Ray Palmer/The Atom (Routh) and Flash‘s Dr. Martin Stein (Garber). Because her Arrow character Sara Lance was killed off, with her sister Laurel Lance (Katie Cassidy) taking over as the Black Canary, it is still TBD whether Lotz will play the same or new superhero on in the spinoff.

Speaking of Flash dynamic duos, Garber’s Stein is flying solo on the new show for now as Robbie Amell, who has played his other half, Firestorm, did not sign for the project. As we previously revealed, the spinoff series will include three major DC Comics characters who have never appeared in a TV series.

Flash and Arrow trailers released thispurcellflash1 past weekend tease upcoming episodes of the two series featuring the Atom, Captain Cold and Heat Wave. You can watch them below.

Berlanti and Kreisberg, who also co-created The Flash, executive produce the new series alongside Guggenheim and Sarah Schechter for Warner Bros. TV and Berlanti Prods.

Purcell is repped by UTA and Untitled.