Things will get a little chilly during the Oct. 28 episode of “The Flash,” titled “Going Rogue,” which introduces one of the Scarlet Speedster’s most iconic and enduring villains: Captain Cold.

Cold, aka Leonard Snart, is played by “Prison Break” star Wentworth Miller, making his return to the small screen after a sojourn spent writing screenplays, including 2013’s gothic thriller “Stoker” and the upcoming “Disappointments Room.”

Speaking to Variety via email about what drew him back to television, Miller admitted, “I’d never heard of Captain Cold. But I’d heard of Greg Berlanti. I have a great deal of respect for what Greg’s accomplished, and I was interested in working with him in some capacity, as an actor or writer or both. So when the offer came in, I was open to coming on board even before I’d read the script. The fact that it was a great part was icing on the cake.”

DC Comics’ Chief Creative Officer Geoff Johns co-wrote the episode, and counts Captain Cold as one of his favorite characters (his office door is emblazoned with artwork of the villain). He previously compared Cold’s “Flash” iteration to Robert De Niro’s character in “Heat,” recently telling reporters, “He’s just this guy who pulls jobs very carefully and suddenly there’s something else in the city and he has to change his game up; he has to figure out how to deal with this new threat in Central City to his way of life. So it’s all about him evolving and surviving in this new world order, and guns aren’t gonna do it, so he’s got to have something a little stronger.”

Miller agreed, “Snart’s street smart but he also understands people. What makes them tick. Or vulnerable. Then he uses those insights to press his advantage.” In tonight’s episode, that insight includes getting his hands on a stolen “cold gun” that could kill The Flash — a weapon that was secretly created by Barry’s ally, Cisco (Carlos Valdes), in STAR Labs.

When asked whether Snart considers Barry to be a true threat or just a nuisance, Miller opined, “I think the answer is ‘both.’ Snart recognizes The Flash is a game changer. When meta-humans start popping up around Central City, it’s not just the good guys who have to adjust. The bad guys do too. Nothing’s the same now. Snart knows he needs to adapt in order to compete. Or go the way of the dinosaurs.”

Miller makes his debut in episode four, but it won’t be the last we see of Captain Cold — he’ll return in episode 10 alongside Miller’s former “Prison Break” costar Dominic Purcell, who plays Heat Wave, another villain from The Flash’s colorful rogues gallery.

While Miller declined to reveal much about their storyline, he did give expand on the relationship between the two criminals: “I think their dynamic speaks to balance. Hot and cold. Brawn and brains. And so on. Snart’s aware enough to know he’ll need help taking out The Flash. As far as the specifics of how that goes down, naturally I can’t tell you.”

“The Flash” airs Tuesdays at 8 p.m. on The CW.

Are you looking forward to seeing Captain Cold brought to life? Which other DC villains are you hoping the show explores? Share your thoughts in the comments.